subject:(radiation detection)

Kansas State University

1. George, Tyrel Daniel Frank. Design and testing of long-lifetime active sensor arrays for in-core multi-dimensional flux measurements.

Degree: MS, Department of Mechanical and Nuclear Engineering, 2016, Kansas State University

URL: http://hdl.handle.net/2097/35229

► Fission chambers are a common type of detector used to determine the neutron flux and power of a nuclear reactor. Due to the limited space… (more)

▼ Fission chambers are a common type of detector used to determine the neutron flux and power of a nuclear reactor. Due to the limited space and high neutron flux in a reactor core, it is difficult to perform real-time flux measurements with present-day in-core instrumentation. Micro-pocket fission detectors, or MPFDs, are relatively small in size and have low neutron sensitivity while retaining a large neutron to gamma ray discrimination ratio, thereby, allowing them to be used as active neutron flux monitors inside a nuclear reactor core. The micro-pocket fission chamber allows for multiple detectors to be inserted into a flux port or other available openings within the nuclear reactor core. Any material used to construct the MPFD must be rugged and capable of sustaining radiation damage for long periods of time. Each calibrated MPFD provides measurements of the flux for a discrete location. The size of these detectors allows for a spatial map of the flux to be developed, enabling real-time analysis of core burnup, power peaking, and rod shadowing. Small diameter thermocouples can be included with the array to also measure the temperature at each location. The following document details the research and development of MPFDs for long term use in nuclear power reactors. Previous MPFD designs were improved, miniaturized, and optimized for long term operations in reactor test ports designed for passive measurements of fluence using iron wires. Detector chambers with dimensions of 0.08 in x 0.06 in x 0.04 in were attached to a common cathode and individual anodes to construct an array of the MPFDs. Each array was tested at the Kansas State University TRIGA Mark II nuclear reactor to demonstrate functionality. The linear response in reactor power was measured. These arrays have also demonstrated reactor power tracking by following reactivity changes in steady state operations and reactor pulsing events. Stability testing showed consistent operation at 100 kW for several hours. The MPFDs have been demonstrated to be a viable technology for in-core measurements. Advisors/Committee Members: Douglas S. McGregor.

Subjects/Keywords: Radiation detection; Neutron detection

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

George, T. D. F. (2016). Design and testing of long-lifetime active sensor arrays for in-core multi-dimensional flux measurements. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/35229

Chicago Manual of Style (16^th Edition):

George, Tyrel Daniel Frank. “Design and testing of long-lifetime active sensor arrays for in-core multi-dimensional flux measurements.” 2016. Masters Thesis, Kansas State University. Accessed July 16, 2019. http://hdl.handle.net/2097/35229.

MLA Handbook (7^th Edition):

George, Tyrel Daniel Frank. “Design and testing of long-lifetime active sensor arrays for in-core multi-dimensional flux measurements.” 2016. Web. 16 Jul 2019.

Vancouver:

George TDF. Design and testing of long-lifetime active sensor arrays for in-core multi-dimensional flux measurements. [Internet] [Masters thesis]. Kansas State University; 2016. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/2097/35229.

Council of Science Editors:

George TDF. Design and testing of long-lifetime active sensor arrays for in-core multi-dimensional flux measurements. [Masters Thesis]. Kansas State University; 2016. Available from: http://hdl.handle.net/2097/35229

Kansas State University

2. Fronk, Ryan G. Dual-side etched microstructured semiconductor neutron detectors.

Degree: PhD, Department of Mechanical and Nuclear Engineering, 2017, Kansas State University

URL: http://hdl.handle.net/2097/35426

► Interest in high-efficiency replacements for thin-film-coated thermal neutron detectors led to the development of single-sided microstructured semiconductor neutron detectors (MSNDs). MSNDs are designed with micro-sized… (more)

▼ Interest in high-efficiency replacements for thin-film-coated thermal neutron detectors led to the development of single-sided microstructured semiconductor neutron detectors (MSNDs). MSNDs are designed with micro-sized trench structures that are etched into a vertically-oriented pvn-junction diode, and backfilled with a neutron converting material, such as ⁶LiF. Neutrons absorbed by the converting material produce a pair of charged-particle reaction products that can be measured by the diode substrate. MSNDs have higher neutron-absorption and reaction-product counting efficiencies than their thin-film-coated counterparts, resulting in up to a 10x increase in intrinsic thermal neutron detection efficiency. The detection efficiency for a single-sided MSND is reduced by neutron streaming paths between the conversion-material filled regions that consequently allow neutrons to pass undetected through the detector. Previously, the highest reported intrinsic thermal neutron detection efficiency for a single MSND was approximately 30%. Methods for double-stacking and aligning MSNDs to reduce neutron streaming produced devices with an intrinsic thermal neutron detection efficiency of 42%. Presented here is a new type of MSND that features a complementary second set of trenches that are etched into the back-side of the detector substrate. These dual-sided microstructured semiconductor neutron detectors (DS-MSNDs) have the ability to absorb and detect neutrons that stream through the front-side, effectively doubling the detection efficiency of a single-sided device. DS-MSND sensors are theoretically capable of achieving greater than 80% intrinsic thermal neutron detection efficiency for a 1-mm thick device. Prototype DS-MSNDs with diffused pvp-junction operated at 0-V applied bias have achieved 53.54±0.61%, exceeding that of the single-sided MSNDs and double-stacked MSNDs to represent a new record for detection efficiency for such solid-state devices. Advisors/Committee Members: Douglas S. McGregor.

Subjects/Keywords: Neutron; Radiation; Neutron detection; Radiation detection

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fronk, R. G. (2017). Dual-side etched microstructured semiconductor neutron detectors. (Doctoral Dissertation). Kansas State University. Retrieved from http://hdl.handle.net/2097/35426

Chicago Manual of Style (16^th Edition):

Fronk, Ryan G. “Dual-side etched microstructured semiconductor neutron detectors.” 2017. Doctoral Dissertation, Kansas State University. Accessed July 16, 2019. http://hdl.handle.net/2097/35426.

MLA Handbook (7^th Edition):

Fronk, Ryan G. “Dual-side etched microstructured semiconductor neutron detectors.” 2017. Web. 16 Jul 2019.

Vancouver:

Fronk RG. Dual-side etched microstructured semiconductor neutron detectors. [Internet] [Doctoral dissertation]. Kansas State University; 2017. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/2097/35426.

Council of Science Editors:

Fronk RG. Dual-side etched microstructured semiconductor neutron detectors. [Doctoral Dissertation]. Kansas State University; 2017. Available from: http://hdl.handle.net/2097/35426

Penn State University

3. Mcgahee, Christopher. HIGH EFFICIENCY FAST NEUTRON DETECTION SYSTEM.

Degree: 2017, Penn State University

URL: https://etda.libraries.psu.edu/catalog/14460cfm5250

► There has been a call over the past decade to create a replacement neutron detection technology for He gas proportional systems1. Following a drastic increase… (more)

Subjects/Keywords: Neutron; Radiation Detection; Safeguards; Nonproliferation

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mcgahee, C. (2017). HIGH EFFICIENCY FAST NEUTRON DETECTION SYSTEM. (Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/14460cfm5250

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mcgahee, Christopher. “HIGH EFFICIENCY FAST NEUTRON DETECTION SYSTEM.” 2017. Thesis, Penn State University. Accessed July 16, 2019. https://etda.libraries.psu.edu/catalog/14460cfm5250.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mcgahee, Christopher. “HIGH EFFICIENCY FAST NEUTRON DETECTION SYSTEM.” 2017. Web. 16 Jul 2019.

Vancouver:

Mcgahee C. HIGH EFFICIENCY FAST NEUTRON DETECTION SYSTEM. [Internet] [Thesis]. Penn State University; 2017. [cited 2019 Jul 16]. Available from: https://etda.libraries.psu.edu/catalog/14460cfm5250.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mcgahee C. HIGH EFFICIENCY FAST NEUTRON DETECTION SYSTEM. [Thesis]. Penn State University; 2017. Available from: https://etda.libraries.psu.edu/catalog/14460cfm5250

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado State University

4. Mann, Jenelle. Improved detection of radioactive material using a series of measurements.

Degree: PhD, Environmental and Radiological Health Sciences, 2016, Colorado State University

URL: http://hdl.handle.net/10217/176788

► The goal of this project is to develop improved algorithms for detection of radioactive sources that have low signal compared to background. The detection of… (more)

Subjects/Keywords: Instrumentation; Statistics; Radiation Detection; Detection Statistics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mann, J. (2016). Improved detection of radioactive material using a series of measurements. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/176788

Chicago Manual of Style (16^th Edition):

Mann, Jenelle. “Improved detection of radioactive material using a series of measurements.” 2016. Doctoral Dissertation, Colorado State University. Accessed July 16, 2019. http://hdl.handle.net/10217/176788.

MLA Handbook (7^th Edition):

Mann, Jenelle. “Improved detection of radioactive material using a series of measurements.” 2016. Web. 16 Jul 2019.

Vancouver:

Mann J. Improved detection of radioactive material using a series of measurements. [Internet] [Doctoral dissertation]. Colorado State University; 2016. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/10217/176788.

Council of Science Editors:

Mann J. Improved detection of radioactive material using a series of measurements. [Doctoral Dissertation]. Colorado State University; 2016. Available from: http://hdl.handle.net/10217/176788

Penn State University

5. Wart, Megan. Evaluation of the Experimental Set-up for Lead Zirconate Titanate Irradiation with Fission Fragments.

Degree: 2017, Penn State University

URL: https://etda.libraries.psu.edu/catalog/14341mvw5502

► Piezoelectric materials convert mechanical to electrical energy, due to dipoles in their crystalstructure. This characteristic may allow for piezoelectric materials to be used to detect… (more)

▼ Piezoelectric materials convert mechanical to electrical energy, due to dipoles in their crystalstructure. This characteristic may allow for piezoelectric materials to be used to detect radiation.As radiation bombards the material it stresses the crystalline structure and, if there is sufficientstress, an electrical signal will be produced. To determine if this proposed method of radiationdetection would work, the threshold of radiation exposure required to create an electrical signalmust be determined.To enable such experiments, an experimental set up must be designed and evaluated computationallyfor radiation safety and feasibility. This includes choosing a form of radiation and thesource to provide it, as well as determining how the piezoelectric plates will be prepared. Forthese experiments, fission fragments will be used due to there relatively high mass, high energy,high specific ionization, and short range. To produce them, a highly enriched uranium foil will beirradiated with a neutron source. A frame was built to hold this foil securely against the samplesof piezoelectric material. Lead zirconate titanate was chosen as the piezoelectric material to betested since it is relatively inexpensive and commercially available.To determine the feasibility of the experiments and the appropriate source, the fission rate andfission fragment production were calculated using a Monte Carlo code for each of the two availablesources: a plutonium beryllium source, and the thermal neutron beamline at the Breazeale reactor.Using the fission rate and the range a fission fragment of average mass, the flux of fission fragmentsentering the piezoelectric plates was calculated.Through this calculation it was shown that the thermal neutron beamline would provide thelarger fission fragment flux to the samples. To maximize the fission fragment flux, in order toimprove the chances of seeing an electrical signal, it was concluded that the thermal neutronbeamline should be used.In the future, other types of radiation, such as alphas or neutrons will be tested. Thepiezoelectric material will also be optimized, by choosing a different compound, structure, orcreating custom piezoelectric materials. Advisors/Committee Members: Marek Flaska, Thesis Advisor.

Subjects/Keywords: radiation detection; fission fragment detection; piezoelectric materials

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wart, M. (2017). Evaluation of the Experimental Set-up for Lead Zirconate Titanate Irradiation with Fission Fragments. (Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/14341mvw5502

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wart, Megan. “Evaluation of the Experimental Set-up for Lead Zirconate Titanate Irradiation with Fission Fragments.” 2017. Thesis, Penn State University. Accessed July 16, 2019. https://etda.libraries.psu.edu/catalog/14341mvw5502.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wart, Megan. “Evaluation of the Experimental Set-up for Lead Zirconate Titanate Irradiation with Fission Fragments.” 2017. Web. 16 Jul 2019.

Vancouver:

Wart M. Evaluation of the Experimental Set-up for Lead Zirconate Titanate Irradiation with Fission Fragments. [Internet] [Thesis]. Penn State University; 2017. [cited 2019 Jul 16]. Available from: https://etda.libraries.psu.edu/catalog/14341mvw5502.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wart M. Evaluation of the Experimental Set-up for Lead Zirconate Titanate Irradiation with Fission Fragments. [Thesis]. Penn State University; 2017. Available from: https://etda.libraries.psu.edu/catalog/14341mvw5502

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

6. Duffin, Taylor. Localization of Neutron Sources with Mobile Radiation Detectors Based on Drone Technology.

Degree: 2017, Penn State University

URL: https://etda.libraries.psu.edu/catalog/14416tbd5106

► The threat of nuclear proliferation and nuclear terrorism are strong motivators for systems that can detect special nuclear materials, including those that are heavily shielded… (more)

Subjects/Keywords: Radiation Detection; Drones; Neutron Detection; Searching Methods

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Duffin, T. (2017). Localization of Neutron Sources with Mobile Radiation Detectors Based on Drone Technology. (Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/14416tbd5106

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Duffin, Taylor. “Localization of Neutron Sources with Mobile Radiation Detectors Based on Drone Technology.” 2017. Thesis, Penn State University. Accessed July 16, 2019. https://etda.libraries.psu.edu/catalog/14416tbd5106.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Duffin, Taylor. “Localization of Neutron Sources with Mobile Radiation Detectors Based on Drone Technology.” 2017. Web. 16 Jul 2019.

Vancouver:

Duffin T. Localization of Neutron Sources with Mobile Radiation Detectors Based on Drone Technology. [Internet] [Thesis]. Penn State University; 2017. [cited 2019 Jul 16]. Available from: https://etda.libraries.psu.edu/catalog/14416tbd5106.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Duffin T. Localization of Neutron Sources with Mobile Radiation Detectors Based on Drone Technology. [Thesis]. Penn State University; 2017. Available from: https://etda.libraries.psu.edu/catalog/14416tbd5106

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Ontario Institute of Technology

7. Broughton, David. Theoretical performance analysis of a novel hemispherical tissue equivalent proportional counter for neutron monitoring and dosimetry.

Degree: 2016, University of Ontario Institute of Technology

URL: http://hdl.handle.net/10155/637

► Neutron dosimetry in reactor fields is currently conducted using thermal neutron flux monitors. It has been demonstrated that Tissue Equivalent Proportional Counters (TEPCs) have the… (more)

▼ Neutron dosimetry in reactor fields is currently conducted using thermal neutron flux monitors. It has been demonstrated that Tissue Equivalent Proportional Counters (TEPCs) have the potential to improve the accuracy of neutron dosimetry in these reactor fields, and Multi-Element Tissue Equivalent Proportional Counters (METEPCs) could reduce the size of instrumentation required to do so. The current METEPC designs are prohibitively complex and are sensitive to motion and audible noise. This work proposes a novel hemispherical element with a wire-less anode ball as a solution. The hemispherical METEPC element was analyzed as a single TEPC to first demonstrate the potential of this new design. Its performance was evaluated relative to current cylindrical and spherical counter designs that have been demonstrated experimentally to perform very well. The performance analysis first used equipotential distributions generated with ANSYS Maxwell (V. 14.0) in order to solve the Townsend equation and calculate radial gas gain distributions for each counter. Through this it was found that the hemispherical counter exhibits completely uniform gas gain for electrons approaching the anode from all directions and its avalanche region occupies only 0.0004% of the entire gas cavity volume, whereas in the cylindrical and spherical counters the avalanche occupies 0.6% and 0.12% of the total gas cavity volume, respectively. Energy deposition simulations were conducted using the Monte Carlo code PHITS (V. 2.24) with both mono-energetic 2.5 MeV neutrons and the neutron spectrum of 252Cf-D2O moderated. In these neutron fields the hemispherical counter appears to be a good alternative to the reference spherical geometry, whereas the cylindrical counter tends to under-respond to H*(10) for the lower neutron energies of the 252Cf-D2O moderated field. These theoretical results are promising, and if the recommended follow-up experimental work demonstrates the hemispherical counter works as anticipated it will be ready to be incorporated into an METEPC design. Advisors/Committee Members: Waker, Anthony.

Subjects/Keywords: Microdosimetry; TEPC; Neutron dosimetry; PHITS; Radiation detection

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Broughton, D. (2016). Theoretical performance analysis of a novel hemispherical tissue equivalent proportional counter for neutron monitoring and dosimetry. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/637

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Broughton, David. “Theoretical performance analysis of a novel hemispherical tissue equivalent proportional counter for neutron monitoring and dosimetry.” 2016. Thesis, University of Ontario Institute of Technology. Accessed July 16, 2019. http://hdl.handle.net/10155/637.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Broughton, David. “Theoretical performance analysis of a novel hemispherical tissue equivalent proportional counter for neutron monitoring and dosimetry.” 2016. Web. 16 Jul 2019.

Vancouver:

Broughton D. Theoretical performance analysis of a novel hemispherical tissue equivalent proportional counter for neutron monitoring and dosimetry. [Internet] [Thesis]. University of Ontario Institute of Technology; 2016. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/10155/637.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Broughton D. Theoretical performance analysis of a novel hemispherical tissue equivalent proportional counter for neutron monitoring and dosimetry. [Thesis]. University of Ontario Institute of Technology; 2016. Available from: http://hdl.handle.net/10155/637

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

8. Flores-McLaughlin, John. Estimation of iron-55 volumetric contamination via surrogates produced during Z-machine operations.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2393

► Analysis of the radiation produced by Z-machine nuclear experiments at Sandia National Laboratory and the materials irradiated indicate that the majority of produced radionuclides can… (more)

▼ Analysis of the radiation produced by Z-machine nuclear experiments at Sandia National Laboratory and the materials irradiated indicate that the majority of produced radionuclides can easily be detected. One significant exception is volumetric contamination of stainless steel by iron-55. Detecting iron-55 in Z-machine components presents a particular problem due to its low-abundance and the low-energy (5.9 keV) xray it emits. The nuclide is often below the minimum detectable activity (MDA) threshold and resolution criteria of many standard radiation detection devices. Liquid scintillation has proven useful in determining iron-55 presence in loose contamination at concentrations below that of regulatory guidelines, but determination of volumetric iron- 55 contamination remains a significant challenge. Due to this difficulty, an alternate method of detection is needed. The use of radioactive surrogates correlating to iron-55 production is proposed in order to establish an estimate of iron-55 abundance. The primary interaction pathways and interaction probabilities for all likely radionuclide production in the Z-machine were tabulated and radionuclides with production pathways matching those of iron-55 production were noted. For purposes of nuclide identification and adequate detection, abundant gamma emitters with half-lives on the order of days were selected for use as surrogates. Interaction probabilities were compared between that of iron-55 production and a chosen surrogate. Weighting factors were developed to account for the differences in the interaction probabilities over the range of the known energy spectra produced on the device. The selection process resulted in cobalt-55, cobalt-57 and chromium-51 as optimal surrogates for iron-55 detection in both deuterium and non-deuterium loaded interactions. A decay corrected correlation of the surrogates (chromium-51, cobalt-57 and cobalt-55) to iron-55 for deuterium and non-deuterium loaded Z-machine driven reactions was derived. The weighting factors presented here are estimates which are based on rough comparisons of cross-section graphs. Analysis considering factors such as energy spectrum criteria to provide refined weighting factors may be utilized in future work. Advisors/Committee Members: Braby, Leslie A. (advisor), Ford, John (committee member), Walker, Michael (committee member).

Subjects/Keywords: radiation detection; iron-55; volumetric contamination

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Flores-McLaughlin, J. (2009). Estimation of iron-55 volumetric contamination via surrogates produced during Z-machine operations. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2393

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Flores-McLaughlin, John. “Estimation of iron-55 volumetric contamination via surrogates produced during Z-machine operations.” 2009. Thesis, Texas A&M University. Accessed July 16, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2393.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Flores-McLaughlin, John. “Estimation of iron-55 volumetric contamination via surrogates produced during Z-machine operations.” 2009. Web. 16 Jul 2019.

Vancouver:

Flores-McLaughlin J. Estimation of iron-55 volumetric contamination via surrogates produced during Z-machine operations. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2393.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Flores-McLaughlin J. Estimation of iron-55 volumetric contamination via surrogates produced during Z-machine operations. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2393

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

9. Sarnoski, Sarah Elizabeth. Validation of Performance Measurements of The Penn State Compton Suppression System.

Degree: MS, Nuclear Engineering, 2016, Penn State University

URL: https://etda.libraries.psu.edu/catalog/28877

► Compton suppression is a measurement technique that reduces the intensity of the Compton continuum, which is composed of the partial energy depositions created via Compton… (more)

▼ Compton suppression is a measurement technique that reduces the intensity of the Compton continuum, which is composed of the partial energy depositions created via Compton scattering of gamma rays in the detector material. The Compton continuum from a high-energy gamma ray can obscure the full-energy gamma ray photopeaks of isotopes with lower energy gamma ray emissions. The reduction from the Compton suppression system enables a more accurate identification of these low-energy gamma rays with energy peaks located within the Compton continuum. The Penn State Compton suppression system (CSS) uses a high purity germanium (HPGe) detector and a cylindrical and plug sodium iodide (NaI(Tl)) guard detector to negate the effect of partially deposited gamma rays on the gamma spectrum produced when measuring a sample. The Penn State CSS negates the effect of partially deposited gamma rays on the overall gamma spectrum, therefore producing a more accurate spectrum with fewer overall counts and reduced background interference. The research performed in this thesis used the Penn State CSS to validate earlier sample measurements obtained prior to the dismantling and reconstruction of the CSS. The Penn State CSS has produced superior results when compared with published literature, and it is important that it continues to perform at this level after reconstruction. 137Cs, 60Co, and irradiated National Institute of Standards and Technology (NIST) standard reference materials were measured in the CSS. A suppression factor (SF) is a comparison of suppressed to unsuppressed peak to Compton ratios, a further explanation and definition is provided in section 6.3 of this thesis. The suppression factor (SF) for the 137Cs calibrated gamma ray spectrum was 9.21, similar to the previous SF measurement of 9.97. These values are approximately 28% larger than most SFs recorded in literature, demonstrating the superior ability of the Penn State CSS. Using the calibrated Penn State CSS, two NIST standard reference materials, SRM 1570 Spinach Leaves and SRM 1571 Orchard Leaves, were measured after irradiation in the Penn State Breazeale Reactor (PSBR). Bare and cadmium covered gold wires were also irradiated in the PSBR to characterize the neutron flux shape of the current core design of the reactor. Peak and average neutron fluxes were determined for each of the irradiation locations, and the axial positions where peak neutron fluxes occurred were determined. The reference materials were irradiated both in the PSBR dry tubes and using the PSBR pneumatic transfer system. The dry tube irradiation of SRM-1570 produced a SF of 3.30 and the pneumatic transfer irradiation of SRM-1570 produced a SF of 3.27±0.21; these values are functionally equivalent. The pneumatic transfer irradiation of SRM-1571 produced a suppression factor of 4.2±0.10, approximately 10% greater than a previous measurement of 3.80. This work irradiated and measured the standard reference materials in triplicate, providing a more accurate evaluation of the CSS capabilities than…

Subjects/Keywords: Compton Suppression; Radiation Detection; Nuclear Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sarnoski, S. E. (2016). Validation of Performance Measurements of The Penn State Compton Suppression System. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/28877

Chicago Manual of Style (16^th Edition):

Sarnoski, Sarah Elizabeth. “Validation of Performance Measurements of The Penn State Compton Suppression System.” 2016. Masters Thesis, Penn State University. Accessed July 16, 2019. https://etda.libraries.psu.edu/catalog/28877.

MLA Handbook (7^th Edition):

Sarnoski, Sarah Elizabeth. “Validation of Performance Measurements of The Penn State Compton Suppression System.” 2016. Web. 16 Jul 2019.

Vancouver:

Sarnoski SE. Validation of Performance Measurements of The Penn State Compton Suppression System. [Internet] [Masters thesis]. Penn State University; 2016. [cited 2019 Jul 16]. Available from: https://etda.libraries.psu.edu/catalog/28877.

Council of Science Editors:

Sarnoski SE. Validation of Performance Measurements of The Penn State Compton Suppression System. [Masters Thesis]. Penn State University; 2016. Available from: https://etda.libraries.psu.edu/catalog/28877

Clemson University

10. Bhattacharyya, Upasana. Estimating the location of a Nuclear Source with Multiple Drones in an Urban Environment.

Degree: PhD, Electrical and Computer Engineering (Holcomb Dept. of), 2018, Clemson University

URL: https://tigerprints.clemson.edu/all_dissertations/2229

► The problem of locating the source of radioactive emissions using a network of sensors is considered. Estimating the three-dimensional location of a nuclear source is… (more)

▼ The problem of locating the source of radioactive emissions using a network of sensors is considered. Estimating the three-dimensional location of a nuclear source is especially difficult in environments in which no sensor can be placed in close proximity to the source. In this dissertation, maximum-likelihood (ML) estimation is applied to a Poisson process model for radiation received at sensors that is proportional to the inverse square of the distance between the source and the sensor. The joint multivariate density for the sensors is then maximized in order to estimate the location and strength of the radioactive source. Additionally, a limited number of sensors is used to implement a two-stage adaptive algorithm. In the first stage the drones sit at the center of a building's faces and an approximate location of the radiation source is obtained. Based on the results of the first stage, in the second stage the drones move to additional locations to collect more data. The data from both stages is utilized to obtain a more accurate estimate of the location of the radiation source. A third topic involves the effects of spatially non-homogeneous attenuation due to highly absorbing materials such as concrete. A novel metric is presented for identifying situations in which non-homogeneity significantly skews estimation results. This metric is used to drive a multiple iteration multi-stage estimation algorithm utilizing multiple applications of ML estimation. The algorithm is analyzed in realistic situations such as highly absorbing walls and a central shaft. Finally, a hybrid algorithm is proposed that first determines with a high degree of reliability whether non-homogeneous attenuation is present. If non-homogeneous attenuation is declared absent, the sensors move according to the adaptive algorithm. If non-homogeneous attenuation is declared present, the multiple-iteration algorithm is employed. This hybrid algorithm performs extremely well whether non-homogeneous is present or absent. Advisors/Committee Members: Dr. Carl W. Baum, Committee Chair, Dr. Harlan B. Russell, Dr. Kuang-Ching Wang, Dr. Brook T. Russell.

Subjects/Keywords: Estimation; Maximum Likelihood; Radiation detection; Signal Processing

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bhattacharyya, U. (2018). Estimating the location of a Nuclear Source with Multiple Drones in an Urban Environment. (Doctoral Dissertation). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_dissertations/2229

Chicago Manual of Style (16^th Edition):

Bhattacharyya, Upasana. “Estimating the location of a Nuclear Source with Multiple Drones in an Urban Environment.” 2018. Doctoral Dissertation, Clemson University. Accessed July 16, 2019. https://tigerprints.clemson.edu/all_dissertations/2229.

MLA Handbook (7^th Edition):

Bhattacharyya, Upasana. “Estimating the location of a Nuclear Source with Multiple Drones in an Urban Environment.” 2018. Web. 16 Jul 2019.

Vancouver:

Bhattacharyya U. Estimating the location of a Nuclear Source with Multiple Drones in an Urban Environment. [Internet] [Doctoral dissertation]. Clemson University; 2018. [cited 2019 Jul 16]. Available from: https://tigerprints.clemson.edu/all_dissertations/2229.

Council of Science Editors:

Bhattacharyya U. Estimating the location of a Nuclear Source with Multiple Drones in an Urban Environment. [Doctoral Dissertation]. Clemson University; 2018. Available from: https://tigerprints.clemson.edu/all_dissertations/2229

Texas A&M University

11. Shah, Manit Devendrabhai. Radiation Detection using Integrated Circuits.

Degree: PhD, Nuclear Engineering, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/174255

► The research objective of this dissertation is to evaluate the capability of ‘radiation’ integrated circuits (RICs) to serve as a new type of radiation detection… (more)

▼ The research objective of this dissertation is to evaluate the capability of ‘radiation’ integrated circuits (RICs) to serve as a new type of radiation detection medium. Designed at Texas A&M University, the RIC contains both radiation-sensitive areas (RSAs) and radiation-hardened areas (RHAs). RSAs are designed so that their electrical properties change when exposed to charged particles. RHAs monitor such changes in RSAs to detect the presence of radiation. Novel detector designs utilizing the RICs were assessed and optimized, using both analytical and simulation methods, to register the major types of radiation: alpha particles, beta particles, gamma rays, and neutrons. The detector system materials and components were varied to characterize different configurations and recommend optimized RIC detector designs. The proposed revolutionary RIC-alpha/beta probe design has two regions: one to detect alpha particles and another to detect betas along with their Eβmax (maximum beta-particle energy). In order to perform the Eβmax discrimination, the maximum penetration depth property of betas in the attenuator was utilized. In MCNPX, plate glass, Pyrex® glass, Lucite®, and natural rubber were studied as attenuator materials. For the proof of concept, attenuator materials in the shape of a wedge were analyzed. The natural rubber in the form of a wedged attenuator was observed to show superior Eβmax discrimination compared to other defined attenuators. The Eβmax resolution capability of 50-keV is possible using natural rubber attenuator. The proposed RIC-neutron detector design uses enriched boron (96% 10^B) as a neutron-reactive coating to generate secondary charged particles. In MCNPX, other neutron-reactive materials (natural boron, B4C, and LiF) were also studied. Analysis showed that compared to other charged particles, alpha-particles were the major contributor to the signal generation in RSAs designed to detect neutrons. With the optimal thickness of 3-µm enriched boron, the signal to noise ratio for thermal neutron detection was increased by approximately three orders of magnitude. The proposed RIC-gamma ray detection system uses a sodium iodide crystal, photocathodes, and the RIC. Unlike the traditional design, the proposed approach places photocathodes on all crystal surfaces to collect optical photons and generate photoelectrons. These photoelectrons interact to generate an electrical signal in the RSAs, and thereby the RIC detects gamma rays. The collection ratio (i.e., the number of collected optical photons under the proposed design compared to the number using a traditional design) was found to be a function of the crystal size, gamma-ray energy, and the source position. The concentration of photoelectrons as a function of the RSA radius size was also assessed to optimize the RSA size. Advisors/Committee Members: Marianno, Craig M (advisor), Khatri, Sunil P (committee member), Boyle, David R (committee member), Poston, Sr., John W (committee member).

Subjects/Keywords: radiation detection; alpha; beta; gamma; neutron; RIC

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shah, M. D. (2016). Radiation Detection using Integrated Circuits. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174255

Chicago Manual of Style (16^th Edition):

Shah, Manit Devendrabhai. “Radiation Detection using Integrated Circuits.” 2016. Doctoral Dissertation, Texas A&M University. Accessed July 16, 2019. http://hdl.handle.net/1969.1/174255.

MLA Handbook (7^th Edition):

Shah, Manit Devendrabhai. “Radiation Detection using Integrated Circuits.” 2016. Web. 16 Jul 2019.

Vancouver:

Shah MD. Radiation Detection using Integrated Circuits. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/1969.1/174255.

Council of Science Editors:

Shah MD. Radiation Detection using Integrated Circuits. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/174255

University of California – Berkeley

12. Schuster, Patricia Frances. Investigating the Anisotropic Scintillation Response in Organic Crystal Scintillator Detectors.

Degree: Nuclear Engineering, 2016, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/81z4t4xs

► Organic scintillator materials have long been used as radiation detectors. They offer simultaneous detection of fast neutrons and gamma rays for applications in nuclear nonproliferation,… (more)

▼ Organic scintillator materials have long been used as radiation detectors. They offer simultaneous detection of fast neutrons and gamma rays for applications in nuclear nonproliferation, international safeguards, and national security. The recent development of high quality stilbene crystals with excellent neutron-gamma pulse shape discrimination (PSD) has generated renewed interest in using crystalline materials. However, crystal organic scintillators are subject to a directional dependence in their response to heavy charged particle interactions, degrading their energy resolution for neutron measurements and worsening their PSD performance. This dissertation presents several studies that experimentally characterize the scintillation anisotropy in organic crystal scintillators. These include measurements of neutron, gamma-ray and cosmic muon interactions in anthracene, a historical benchmark among organic scintillator materials, to confirm and extend measurements previously available in the literature. The gamma-ray and muon measurements provide new experimental confirmation that no scintillation anisotropy is present in their interactions. Observations from these measurements have updated the hypothesis for the physical mechanism that is responsible for the scintillation anisotropy concluding that a relatively high dE/dx is required in order to produce a scintillation anisotropy. The directional dependence of the scintillation output in liquid and plastic materials was measured to experimentally confirm that no scintillation anisotropy correlated to detector orientation exists in amorphous materials. These observations confirm that the scintillation anisotropy is not due to an external effect on the measurement system, and that a fixed, repeating structure is required for a scintillation anisotropy.The directional dependence of the scintillation output in response to neutron interactions was measured in four stilbene crystals of various sizes and growth-methods. The scintillation anisotropy in these materials was approximately uniform, indicating that the crystal size, geometry, and growth method do not significantly impact the effect. Measurements of three additional pure crystals and two mixed crystals were made. These measurements showed that 1) the magnitude of the effect varies with energy and material, 2) the relationship between the light output and pulse shape anisotropy varies across materials, and 3) the effect in mixed materials is very complex. These measurements have informed the hypothesis of the mechanism that produces the directional dependence. By comparing the various relationships between the light output and pulse shape anisotropy across materials, these measurements indicate that the preferred directions of singlet and triplet excitation transport may be the same in some materials and different in other materials. The measurements performed in this work serve as a resource to groups who aim to correct for the scintillation anisotropy or employ it as a directional detection modality.…

Subjects/Keywords: Nuclear engineering; Nuclear physics and radiation; neutron detection; organic scintillator; radiation detection; scintillation anisotropy

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Schuster, P. F. (2016). Investigating the Anisotropic Scintillation Response in Organic Crystal Scintillator Detectors. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/81z4t4xs

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Schuster, Patricia Frances. “Investigating the Anisotropic Scintillation Response in Organic Crystal Scintillator Detectors.” 2016. Thesis, University of California – Berkeley. Accessed July 16, 2019. http://www.escholarship.org/uc/item/81z4t4xs.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Schuster, Patricia Frances. “Investigating the Anisotropic Scintillation Response in Organic Crystal Scintillator Detectors.” 2016. Web. 16 Jul 2019.

Vancouver:

Schuster PF. Investigating the Anisotropic Scintillation Response in Organic Crystal Scintillator Detectors. [Internet] [Thesis]. University of California – Berkeley; 2016. [cited 2019 Jul 16]. Available from: http://www.escholarship.org/uc/item/81z4t4xs.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Schuster PF. Investigating the Anisotropic Scintillation Response in Organic Crystal Scintillator Detectors. [Thesis]. University of California – Berkeley; 2016. Available from: http://www.escholarship.org/uc/item/81z4t4xs

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Texas – Austin

13. Goshev, Stefan Antoanov. Analysis of smuggler movement on multiple transportation networks.

Degree: Mechanical Engineering, 2011, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2011-05-3357

► We analyze an interdiction problem in which a nuclear-material smuggler can traverse multiple transportation networks, wherein each edge has an indigenous probability of evasion. Our… (more)

Subjects/Keywords: Interdiction networks; Nuclear smuggling; Radiation detectors; Radiation warning systems; Detection; Nuclear counters

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Goshev, S. A. (2011). Analysis of smuggler movement on multiple transportation networks. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-05-3357

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Goshev, Stefan Antoanov. “Analysis of smuggler movement on multiple transportation networks.” 2011. Thesis, University of Texas – Austin. Accessed July 16, 2019. http://hdl.handle.net/2152/ETD-UT-2011-05-3357.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Goshev, Stefan Antoanov. “Analysis of smuggler movement on multiple transportation networks.” 2011. Web. 16 Jul 2019.

Vancouver:

Goshev SA. Analysis of smuggler movement on multiple transportation networks. [Internet] [Thesis]. University of Texas – Austin; 2011. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3357.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Goshev SA. Analysis of smuggler movement on multiple transportation networks. [Thesis]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3357

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Texas – Austin

14. Hawley, Megan Lynn. Interdicting smuggler movement with transparent and non-transparent assets.

Degree: Mechanical Engineering, 2012, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2012-05-5765

► We analyze an interdiction problem in which a nuclear-material smuggler can traverse the rail and road ports of entry (POEs) along the Mexican and Canadian… (more)

Subjects/Keywords: Interdiction networks; Nuclear smuggling; Radiation detectors; Radiation warning systems; Detection; Transparent assets; Non-transparent assets

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hawley, M. L. (2012). Interdicting smuggler movement with transparent and non-transparent assets. (Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2012-05-5765

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hawley, Megan Lynn. “Interdicting smuggler movement with transparent and non-transparent assets.” 2012. Thesis, University of Texas – Austin. Accessed July 16, 2019. http://hdl.handle.net/2152/ETD-UT-2012-05-5765.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hawley, Megan Lynn. “Interdicting smuggler movement with transparent and non-transparent assets.” 2012. Web. 16 Jul 2019.

Vancouver:

Hawley ML. Interdicting smuggler movement with transparent and non-transparent assets. [Internet] [Thesis]. University of Texas – Austin; 2012. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/2152/ETD-UT-2012-05-5765.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hawley ML. Interdicting smuggler movement with transparent and non-transparent assets. [Thesis]. University of Texas – Austin; 2012. Available from: http://hdl.handle.net/2152/ETD-UT-2012-05-5765

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

15. Lázna, Tomáš. Měření záření gama .

Degree: 2015, Brno University of Technology

URL: http://hdl.handle.net/11012/39234

► Práce se věnuje detekci ionizujícího záření, zvláště záření gama. V obecné části seznamuje čtenáře s problematikou a rozebírá nejpoužívanější typy detektorů – plynové, scintilační a… (more)

Subjects/Keywords: radiace; záření gama; mobilní robot; dálková detekce; radiation; gamma radiation; mobile robot; remote detection

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lázna, T. (2015). Měření záření gama . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/39234

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lázna, Tomáš. “Měření záření gama .” 2015. Thesis, Brno University of Technology. Accessed July 16, 2019. http://hdl.handle.net/11012/39234.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lázna, Tomáš. “Měření záření gama .” 2015. Web. 16 Jul 2019.

Vancouver:

Lázna T. Měření záření gama . [Internet] [Thesis]. Brno University of Technology; 2015. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/11012/39234.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lázna T. Měření záření gama . [Thesis]. Brno University of Technology; 2015. Available from: http://hdl.handle.net/11012/39234

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado State University

16. Meengs, Matthew Richard. Detection of a weak radiological source in ambient background using spectral analysis.

Degree: MS(M.S.), Environmental and Radiological Health Sciences, 2018, Colorado State University

URL: http://hdl.handle.net/10217/191381

► The detection of radiation requires the use of statistical tools due to the probabilistic nature of the emission and interaction properties of radiation, an analysis… (more)

▼ The detection of radiation requires the use of statistical tools due to the probabilistic nature of the emission and interaction properties of radiation, an analysis that includes the testing of a hypothesis regarding the presence or absence of a source against background. Traditionally, a false positive rate of 5% is used to calculate a y*, the decision threshold, above which a source is determined to be present. However, in radiological conditions where a source is both improbable and weak, and where counting time is limited, detection of a source becomes increasingly challenging using this traditional method. The detection of clandestine fissile materials presents such a challenge, and with the increasing risk of nuclear proliferation, there exists a growing desire to research more optimal methods in detecting these sources, especially where a missed detection is of such high consequence. Previous research has shown that using a string of measurements, and calculating a detection limit based on a certain number of false positives within that string, consistently outperforms the traditional method of basing the detection limit on just one measurement. Such research to date has only been applied to counts of all energies (gross counts). The purpose of this research is to apply the success of this new detection algorithm to certain energies within the spectrum, and to discover whether further optimization is possible by this process. Optimization was evaluated using receiver operator characteristic (ROC) curves, where special emphasis was placed at the lower false positive values. Over the course of this research, two hypothesis were tested. The first hypothesis conjectures that it is indeed possible to further optimize source detection when using an energy bin other than gross counts. The second hypothesis postulates that if the first hypothesis is true, than there exists a mathematical criterion that predicts this behavior. Both hypothesis were verified to be correct. Advisors/Committee Members: Brandl, Alex (advisor), Johnson, Thomas (advisor), Kokoszka, Piotr (committee member).

Subjects/Keywords: detection of a weak source; new statistical algorithm for radiation detection; detection of a weak radiological source; spectral analysis; new methods of radiation detection

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Meengs, M. R. (2018). Detection of a weak radiological source in ambient background using spectral analysis. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/191381

Chicago Manual of Style (16^th Edition):

Meengs, Matthew Richard. “Detection of a weak radiological source in ambient background using spectral analysis.” 2018. Masters Thesis, Colorado State University. Accessed July 16, 2019. http://hdl.handle.net/10217/191381.

MLA Handbook (7^th Edition):

Meengs, Matthew Richard. “Detection of a weak radiological source in ambient background using spectral analysis.” 2018. Web. 16 Jul 2019.

Vancouver:

Meengs MR. Detection of a weak radiological source in ambient background using spectral analysis. [Internet] [Masters thesis]. Colorado State University; 2018. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/10217/191381.

Council of Science Editors:

Meengs MR. Detection of a weak radiological source in ambient background using spectral analysis. [Masters Thesis]. Colorado State University; 2018. Available from: http://hdl.handle.net/10217/191381

University of California – Berkeley

17. Yee, Ryan Matthew. Beta-delayed neutron spectroscopy using trapped radioactive ions.

Degree: Nuclear Engineering, 2013, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/5vk4z6bs

► A novel technique for beta-delayed neutron spectroscopy has been developed using trapped radioactive ions. The neutron energy spectrum was reconstructed by measuring the time of… (more)

Subjects/Keywords: Nuclear engineering; Nuclear physics; Decay spectroscopy; Ion trapping; Neutron detection; Radiation detection

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yee, R. M. (2013). Beta-delayed neutron spectroscopy using trapped radioactive ions. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/5vk4z6bs

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yee, Ryan Matthew. “Beta-delayed neutron spectroscopy using trapped radioactive ions.” 2013. Thesis, University of California – Berkeley. Accessed July 16, 2019. http://www.escholarship.org/uc/item/5vk4z6bs.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yee, Ryan Matthew. “Beta-delayed neutron spectroscopy using trapped radioactive ions.” 2013. Web. 16 Jul 2019.

Vancouver:

Yee RM. Beta-delayed neutron spectroscopy using trapped radioactive ions. [Internet] [Thesis]. University of California – Berkeley; 2013. [cited 2019 Jul 16]. Available from: http://www.escholarship.org/uc/item/5vk4z6bs.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yee RM. Beta-delayed neutron spectroscopy using trapped radioactive ions. [Thesis]. University of California – Berkeley; 2013. Available from: http://www.escholarship.org/uc/item/5vk4z6bs

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Kansas State University

18. Edwards, Nathaniel Scott. ⁶Li-based suspended foil microstrip neutron detectors.

Degree: PhD, Department of Mechanical and Nuclear Engineering, 2018, Kansas State University

URL: http://hdl.handle.net/2097/39131

► The low natural abundance and supply shortage of ³He has resulted in an increase in the cost of ³He. The increase in cost of ³He… (more)

▼ The low natural abundance and supply shortage of ³He has resulted in an increase in the cost of ³He. The increase in cost of ³He proportional counters has motived the development of low cost, high efficiency, low gamma-ray sensitivity alternative technologies. A recently developed alternative technology is the ⁶Li-based suspended foil microstrip neutron detector (SFMND) that combines the neutron-conversion and gamma-ray discrimination capabilities of ⁶Li foils with the mechanical robustness and electrical capabilities of microstrip electrodes. SFMNDs differ from Li-foil multi-wire proportional counters because the anode wires are replaced by a single microstrip electrode that improves the mechanical robustness, reduces the microphonic sensitivity, and allows for more ⁶Li foils to be incorporated within a smaller form factor. The first-ever SFMNDs containing one and five 96%-enriched, 75-µm thick ⁶Li foils were fabricated using a silicon microstrip electrode. Neutron-sensitivity testing was performed yielding measured intrinsic thermal-neutron detection efficiencies, εth, of 4.02 ± 0.04% and 14.58 ± 0.11%, respectively. High electrode capacitance and gain instability were exhibited by the silicon microstrip electrode during neutron-sensitivity testing that led to the search for an electrically-stable microstrip-electrode substrate. Schott Borofloat® 33 glass was identified as an electrically-stable substrate and microstrip electrodes were fabricated and characterized. The Schott Borofloat® 33 microstrip electrodes were electrically-stable for a minimum duration of time of approximately 23 hours and had capacitances over an order of magnitude less than the identically sized silicon microstrip electrodes. One- and five-foil SFMNDs were fabricated with a Schott Borofloat® 33 microstrip electrode. Using 96%-enriched, 75-µm thick ⁶Li foils, the one- and five-foil devices had maximum measured εth of 12.58 ± 0.15% and 29.75 ± 0.26%, respectively, with measured gamma-ray rejection ratios of 6.46 x 10⁻⁵ ± 4.32 x 10⁻⁷ and 7.96 x 10-5 ± 4.65 x 10-7 for a ¹³⁷Cs exposure rate of 50 mR hr⁻¹. Devices containing one, five, ten, and twenty 96%-enriched, 75-µm thick ⁶Li foils were simulated using MCNP6 and are theoretically capable of having εth of 18.36%, 54.08%, 65.43%, and 68.36%, respectively. The deviation between measured and simulated εth is suspected to occur due to the electric field strength distribution, electron attachment, microstrip-electrode capacitance, or any combination thereof and solutions for each of these suspected concerns are described. Advisors/Committee Members: Douglas S. McGregor.

Subjects/Keywords: Neutron detection; Radiation detection; Microstrip electrodes; Lithium foil; Device characterization; Gas-filled neutron detector

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Edwards, N. S. (2018). ⁶Li-based suspended foil microstrip neutron detectors. (Doctoral Dissertation). Kansas State University. Retrieved from http://hdl.handle.net/2097/39131

Chicago Manual of Style (16^th Edition):

Edwards, Nathaniel Scott. “⁶Li-based suspended foil microstrip neutron detectors.” 2018. Doctoral Dissertation, Kansas State University. Accessed July 16, 2019. http://hdl.handle.net/2097/39131.

MLA Handbook (7^th Edition):

Edwards, Nathaniel Scott. “⁶Li-based suspended foil microstrip neutron detectors.” 2018. Web. 16 Jul 2019.

Vancouver:

Edwards NS. ⁶Li-based suspended foil microstrip neutron detectors. [Internet] [Doctoral dissertation]. Kansas State University; 2018. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/2097/39131.

Council of Science Editors:

Edwards NS. ⁶Li-based suspended foil microstrip neutron detectors. [Doctoral Dissertation]. Kansas State University; 2018. Available from: http://hdl.handle.net/2097/39131

University of Illinois – Urbana-Champaign

19. Zircher, Christian Donald. Radiation network within a virtual environment.

Degree: MS, Nuclear, Plasma, Radiolgc Engr, 2017, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/97462

► Radiation sensor networks play a key role in the detection, localization, and ultimately prevention of nuclear threats. These sensor networks create large amounts of data… (more)

▼ Radiation sensor networks play a key role in the detection, localization, and ultimately prevention of nuclear threats. These sensor networks create large amounts of data that must be processed. Currently, there are studies focusing on how to collect, analyze, and visualize these large amounts of data. The goal of the Radiation Sensor Network within a Virtual Environment is to visualize the data collected from a radiation sensor network in real-time and in such a way that experts as well as non-experts can fully utilize the information. This thesis begins by presenting existing data presentation methods before proposing its own solution. Next the radiation sensor network used for this project is described along with the storage system for the network's data. We then discuss the game engine, Unity, used to host the virtual environment along with its purposes and abilities, which includes scripting, additional modeling, and detailing. An alternative game engine, Amazon Lumberyard, is discussed as well as a possible replacement for Unity due to its native integration to the cloud computing services used for the network's data storage. Next, the area needed to be modeled is presented along with the methods used for the 3D modeling. The computer software, SketchUp, is used for the majority of the modeling, such as the buildings and terrain. Alternative methods utilizing photogrammetry and or inferred scanning used for objects of complex geometries are also presented. The data acquisition process is then presented, which includes multiple scripts used to pull data from cloud storage and transform it into a format readable to the game engine. The next section discusses the techniques used to visualize the geospatial data within the virtual environment. This is done by converting the latitude longitude coordinates collected from each sensor node into the Cartesian format used by the game engine. Movement of the detectors is visualized using a method called "Waypoint Based Movement" which effectively interpolates the geospatial data points. We then focus on the multiple visualization techniques developed to display the data collected from a radiation sensor network in real-time. The methods include both 2D and 3D visualizations which utilize either or both heat maps and height maps as well as an alarm system. This thesis concludes with proposals for future work on other visualization techniques as well as decreasing the time between data collection and data visualization. Advisors/Committee Members: Sullivan, Clair J (advisor), Uddin, Rizwan (committee member).

Subjects/Keywords: Radiation sensor network; Mobile sensor network; Radiation detection; 3D radiation visualization; Live-time radiation monitoring; Live data visualization; Unity 3D; SketchUp; Radiation map

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zircher, C. D. (2017). Radiation network within a virtual environment. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/97462

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zircher, Christian Donald. “Radiation network within a virtual environment.” 2017. Thesis, University of Illinois – Urbana-Champaign. Accessed July 16, 2019. http://hdl.handle.net/2142/97462.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zircher, Christian Donald. “Radiation network within a virtual environment.” 2017. Web. 16 Jul 2019.

Vancouver:

Zircher CD. Radiation network within a virtual environment. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2017. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/2142/97462.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zircher CD. Radiation network within a virtual environment. [Thesis]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/97462

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Ontario Institute of Technology

20. Miller, Alexander Luke. Development of a semi-autonomous directional and spectroscopic radiation detection mobile platform.

Degree: 2014, University of Ontario Institute of Technology

URL: http://hdl.handle.net/10155/425

► This thesis presents a method for a small, inexpensive mobile robot equipped with a single high resolution scintillation detector to quickly survey an area and… (more)

Subjects/Keywords: Gamma ray detector; Radioactive source localization; Lanthanum bromide; Radiation detection robot

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Miller, A. L. (2014). Development of a semi-autonomous directional and spectroscopic radiation detection mobile platform. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/425

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Miller, Alexander Luke. “Development of a semi-autonomous directional and spectroscopic radiation detection mobile platform.” 2014. Thesis, University of Ontario Institute of Technology. Accessed July 16, 2019. http://hdl.handle.net/10155/425.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Miller, Alexander Luke. “Development of a semi-autonomous directional and spectroscopic radiation detection mobile platform.” 2014. Web. 16 Jul 2019.

Vancouver:

Miller AL. Development of a semi-autonomous directional and spectroscopic radiation detection mobile platform. [Internet] [Thesis]. University of Ontario Institute of Technology; 2014. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/10155/425.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Miller AL. Development of a semi-autonomous directional and spectroscopic radiation detection mobile platform. [Thesis]. University of Ontario Institute of Technology; 2014. Available from: http://hdl.handle.net/10155/425

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

21. Erchinger, Jennifer. Investigating the Operational Capabilities of Custom and Pedestrian Portal Monitoring Systems for Screening Livestock for Radioactive Contamination.

Degree: 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/149544

► Livestock and companion animals are valuable economically and emotionally in the economy of many states and to their citizens. In a radiological emergency situation, the… (more)

▼ Livestock and companion animals are valuable economically and emotionally in the economy of many states and to their citizens. In a radiological emergency situation, the loss of a large amount of livestock could be devastating to a state or national economy. If such an event occurred, there are currently no screening and decontamination protocols for the handling of livestock. This research investigated current policies and procedures for monitoring and decontamination of livestock and companion animals, as well as testing pedestrian portal monitors and a newly designed livestock portal capable of radionuclide identification. It was discovered that only ten states addressed companion animals or livestock anywhere in their emergency planning. Of the ten, only North Carolina, Washington, and a Massachusetts K9 unit had detailed decontamination procedures to report for companion animals. None of the states included detailed procedures for livestock. To address livestock screening, three pedestrian portal monitoring systems were tested in the field and lab trials ? the Johnson AM801, TSA TPM903A, and Ludlum 52-1-1. The systems were tested for position and count rate sensitivity with 1 and 5 ?Ci 137Cs sources placed on four locations on a steer. Factors such as operability and ease of use were also considered. All three systems would alarm when a 5 ?Ci 137Cs source was used and the occupancy sensor was triggered. The Johnson AM801 system was determined to be the most appropriate for use in livestock screening due to sensitive alarm algorithms, greater position discrimination with four detectors, and ease of adjustment for agricultural purposes. The last phase of this project included designing and constructing a portal system that included radionuclide identification capabilities. An array of six sodium iodide detectors was mounted on a panel and field-tested beside a cattle chute and in a walkway. The custom portal, the Bovine Screening Portal (BSP), observed increased count rates (>10?) from a 5 ?Ci 137Cs source in live time. The BSP demonstrated better detection and localization of the source and spectral identification capabilities compared to the commercially available pedestrian systems. Advisors/Committee Members: Marianno, Craig (advisor), Poston, John (committee member), Herring, Andy (committee member).

Subjects/Keywords: livestock; radiation detection; livestock portal monitor; pedestrian portal monitor

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Erchinger, J. (2013). Investigating the Operational Capabilities of Custom and Pedestrian Portal Monitoring Systems for Screening Livestock for Radioactive Contamination. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/149544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Erchinger, Jennifer. “Investigating the Operational Capabilities of Custom and Pedestrian Portal Monitoring Systems for Screening Livestock for Radioactive Contamination.” 2013. Thesis, Texas A&M University. Accessed July 16, 2019. http://hdl.handle.net/1969.1/149544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Erchinger, Jennifer. “Investigating the Operational Capabilities of Custom and Pedestrian Portal Monitoring Systems for Screening Livestock for Radioactive Contamination.” 2013. Web. 16 Jul 2019.

Vancouver:

Erchinger J. Investigating the Operational Capabilities of Custom and Pedestrian Portal Monitoring Systems for Screening Livestock for Radioactive Contamination. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2019 Jul 16]. Available from: http://hdl.handle.net/1969.1/149544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Erchinger J. Investigating the Operational Capabilities of Custom and Pedestrian Portal Monitoring Systems for Screening Livestock for Radioactive Contamination. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/149544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The Ohio State University

22. Wilson, Tiffany M S. Processing Induced Order and Resultant Electrical Properties in Substituted Poly(p-phenylene vinylene)s.

Degree: PhD, Chemical Engineering, 2008, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1221867969

► Inorganic semiconductor-based electronic devices have revolutionized the world in the last fifty years, but have limitations of crystalline requirements, cost, and mechanical properties. Organic… (more)

Subjects/Keywords: Chemical Engineering; polymer; radiation detection; infrared dichroism; semiconductor

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wilson, T. M. S. (2008). Processing Induced Order and Resultant Electrical Properties in Substituted Poly(p-phenylene vinylene)s. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1221867969

Chicago Manual of Style (16^th Edition):

Wilson, Tiffany M S. “Processing Induced Order and Resultant Electrical Properties in Substituted Poly(p-phenylene vinylene)s.” 2008. Doctoral Dissertation, The Ohio State University. Accessed July 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1221867969.

MLA Handbook (7^th Edition):

Wilson, Tiffany M S. “Processing Induced Order and Resultant Electrical Properties in Substituted Poly(p-phenylene vinylene)s.” 2008. Web. 16 Jul 2019.

Vancouver:

Wilson TMS. Processing Induced Order and Resultant Electrical Properties in Substituted Poly(p-phenylene vinylene)s. [Internet] [Doctoral dissertation]. The Ohio State University; 2008. [cited 2019 Jul 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1221867969.

Council of Science Editors:

Wilson TMS. Processing Induced Order and Resultant Electrical Properties in Substituted Poly(p-phenylene vinylene)s. [Doctoral Dissertation]. The Ohio State University; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1221867969

The Ohio State University

23. Wang, Jinghui. Fabrication, Characterization and Simulation of Sandwich Structure GaN Schottky Diode Ionizing Radiation Detectors.

Degree: PhD, Nuclear Engineering, 2014, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1405497243

► The current shortage of Helium-3 proposes a challenge for searching other neutron detection methods to fulfill the increased demand in both industry and academic research… (more)

Subjects/Keywords: Nuclear Engineering; GaN, radiation detector, neutron detection, TCAD, Nanofabrication

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wang, J. (2014). Fabrication, Characterization and Simulation of Sandwich Structure GaN Schottky Diode Ionizing Radiation Detectors. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1405497243

Chicago Manual of Style (16^th Edition):

Wang, Jinghui. “Fabrication, Characterization and Simulation of Sandwich Structure GaN Schottky Diode Ionizing Radiation Detectors.” 2014. Doctoral Dissertation, The Ohio State University. Accessed July 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1405497243.

MLA Handbook (7^th Edition):

Wang, Jinghui. “Fabrication, Characterization and Simulation of Sandwich Structure GaN Schottky Diode Ionizing Radiation Detectors.” 2014. Web. 16 Jul 2019.

Vancouver:

Wang J. Fabrication, Characterization and Simulation of Sandwich Structure GaN Schottky Diode Ionizing Radiation Detectors. [Internet] [Doctoral dissertation]. The Ohio State University; 2014. [cited 2019 Jul 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1405497243.

Council of Science Editors:

Wang J. Fabrication, Characterization and Simulation of Sandwich Structure GaN Schottky Diode Ionizing Radiation Detectors. [Doctoral Dissertation]. The Ohio State University; 2014. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1405497243

Hong Kong University of Science and Technology

24. Lai, Ying Hoi. MBE-grown MgS-based solar-blind UV detector for flame sensing applications.

Degree: 2014, Hong Kong University of Science and Technology

URL: https://doi.org/10.14711/thesis-b1432362 ; http://repository.ust.hk/ir/bitstream/1783.1-72525/1/th_redirect.html

► Details of the development of MBE-grown MgS thin films, including the growth optimization, crystal-structure and chemical characterization and the studies on the scientific issues involved… (more)

▼ Details of the development of MBE-grown MgS thin films, including the growth optimization, crystal-structure and chemical characterization and the studies on the scientific issues involved in these research works were addressed in this thesis. The fabrication and characterization of a novel MgS-based UV-detector system, which is suitable for flame sensing applications, was also described in this thesis. High quality MBE-grown single-crystalline MgS thin films on GaAs substrates of two different orientations were successfully prepared. The respective optimized conditions of growth were identified. The prepared thin films were characterized by both in-situ and ex-situ techniques of RHEED, AES, EBSD and HRXRD to confirm their chemical compositions and crystal structures. It was found that the rocksalt (RS) phase is favored for MgS grown on zinc-blende (ZB) GaAs(100) substrates. This can be attributed to the lacking of required interface species for forming ZB MgS as MgAs has not been shown to exist and GaS was only reported to exist in hexagonal phase. MgS, being ionic in nature, therefore favors its most thermally stable phase of RS structure instead of the lattice-matched ZB phase when it was grown on a ZB GaAs(100) surface. This is similar to ionic thin films of RS NaCl, RbF and MgO forming on diamond and ZB substrates. Deviation of the above expectation was also addressed for wurtzite (WZ) MgS resulted in its growth on GaAs(111)B substrates. This is due to the rather small (~0.8%) lattice mismatch, existence of hexagonal GaS and Mg₂As₃ interface species and the non-thermal equilibrium growth condition in MBE. These underlying mechanisms addressed provide insight in the preparation of non-thermally-stable phases of thin-film material when a non-thermal-equilibrium growth technique is used. Photoresponse curves of RS MgS-based and WZ MgS-based UV detectors display 4 to 5 orders of visible rejection with cutoff wavelengths at 235nm and 245nm respectively. These values correspond to photon energies of 5.28eV and 5.06eV. The estimated bandgap of 5.06eV for WZ MgS is also consistent with the results obtained from the reflectance measurement conducted, in which a band-edge absorption dip at 5.10eV was found. These experimental values of estimated bandgaps for both RS MgS and WZ MgS are found to be much larger than the theoretical values previously predicted. Packaging of MgS-based UV detectors in both transistor-outline can and surface-mount-device chip packages was demonstrated. Possibilities for the integration of a metal-dielectric-metal (MDM) filter into a fire-sensing unit based on a MgS-based UV detector were also examined through the fabrication and analysis of MDM filters.

Subjects/Keywords: Molecular beam epitaxy; Ultraviolet radiation; Detection; Thin films; Materials; Magnesium sulfate

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lai, Y. H. (2014). MBE-grown MgS-based solar-blind UV detector for flame sensing applications. (Thesis). Hong Kong University of Science and Technology. Retrieved from https://doi.org/10.14711/thesis-b1432362 ; http://repository.ust.hk/ir/bitstream/1783.1-72525/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lai, Ying Hoi. “MBE-grown MgS-based solar-blind UV detector for flame sensing applications.” 2014. Thesis, Hong Kong University of Science and Technology. Accessed July 16, 2019. https://doi.org/10.14711/thesis-b1432362 ; http://repository.ust.hk/ir/bitstream/1783.1-72525/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lai, Ying Hoi. “MBE-grown MgS-based solar-blind UV detector for flame sensing applications.” 2014. Web. 16 Jul 2019.

Vancouver:

Lai YH. MBE-grown MgS-based solar-blind UV detector for flame sensing applications. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2014. [cited 2019 Jul 16]. Available from: https://doi.org/10.14711/thesis-b1432362 ; http://repository.ust.hk/ir/bitstream/1783.1-72525/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lai YH. MBE-grown MgS-based solar-blind UV detector for flame sensing applications. [Thesis]. Hong Kong University of Science and Technology; 2014. Available from: https://doi.org/10.14711/thesis-b1432362 ; http://repository.ust.hk/ir/bitstream/1783.1-72525/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Hong Kong University of Science and Technology

25. Liu, Yi. Design and physical characterization of CaS solar-blind UV detector.

Degree: 2015, Hong Kong University of Science and Technology

URL: https://doi.org/10.14711/thesis-b1514916 ; http://repository.ust.hk/ir/bitstream/1783.1-80203/1/th_redirect.html

► Ultraviolet (UV) photodetectors working in solar-blind spectrum ranging from 220 to 280 nm with very high sensitivity are of importance for versatile applications, such as… (more)

Subjects/Keywords: Ultraviolet radiation; Detection; Thin films; Materials; Molecular beam epitaxy

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liu, Y. (2015). Design and physical characterization of CaS solar-blind UV detector. (Thesis). Hong Kong University of Science and Technology. Retrieved from https://doi.org/10.14711/thesis-b1514916 ; http://repository.ust.hk/ir/bitstream/1783.1-80203/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Liu, Yi. “Design and physical characterization of CaS solar-blind UV detector.” 2015. Thesis, Hong Kong University of Science and Technology. Accessed July 16, 2019. https://doi.org/10.14711/thesis-b1514916 ; http://repository.ust.hk/ir/bitstream/1783.1-80203/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Liu, Yi. “Design and physical characterization of CaS solar-blind UV detector.” 2015. Web. 16 Jul 2019.

Vancouver:

Liu Y. Design and physical characterization of CaS solar-blind UV detector. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2015. [cited 2019 Jul 16]. Available from: https://doi.org/10.14711/thesis-b1514916 ; http://repository.ust.hk/ir/bitstream/1783.1-80203/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Liu Y. Design and physical characterization of CaS solar-blind UV detector. [Thesis]. Hong Kong University of Science and Technology; 2015. Available from: https://doi.org/10.14711/thesis-b1514916 ; http://repository.ust.hk/ir/bitstream/1783.1-80203/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Hong Kong University of Science and Technology

26. Ye, Yuran. Development and application of a liquid chromatography-mass spectrometry method for the detection of 2-alkylcyclobutanones in irradiated food.

Degree: 2013, Hong Kong University of Science and Technology

URL: https://doi.org/10.14711/thesis-b1239465 ; http://repository.ust.hk/ir/bitstream/1783.1-7983/1/th_redirect.html

► Food irradiation is one of the most common food preservation methods and is used on aglobal scale. The ability to identify irradiated food is important… (more)

Subjects/Keywords: Radiation preservation of food; Mass spectrometry; Irradiated foods; Radioactive substances; Detection

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ye, Y. (2013). Development and application of a liquid chromatography-mass spectrometry method for the detection of 2-alkylcyclobutanones in irradiated food. (Thesis). Hong Kong University of Science and Technology. Retrieved from https://doi.org/10.14711/thesis-b1239465 ; http://repository.ust.hk/ir/bitstream/1783.1-7983/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ye, Yuran. “Development and application of a liquid chromatography-mass spectrometry method for the detection of 2-alkylcyclobutanones in irradiated food.” 2013. Thesis, Hong Kong University of Science and Technology. Accessed July 16, 2019. https://doi.org/10.14711/thesis-b1239465 ; http://repository.ust.hk/ir/bitstream/1783.1-7983/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ye, Yuran. “Development and application of a liquid chromatography-mass spectrometry method for the detection of 2-alkylcyclobutanones in irradiated food.” 2013. Web. 16 Jul 2019.

Vancouver:

Ye Y. Development and application of a liquid chromatography-mass spectrometry method for the detection of 2-alkylcyclobutanones in irradiated food. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2013. [cited 2019 Jul 16]. Available from: https://doi.org/10.14711/thesis-b1239465 ; http://repository.ust.hk/ir/bitstream/1783.1-7983/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ye Y. Development and application of a liquid chromatography-mass spectrometry method for the detection of 2-alkylcyclobutanones in irradiated food. [Thesis]. Hong Kong University of Science and Technology; 2013. Available from: https://doi.org/10.14711/thesis-b1239465 ; http://repository.ust.hk/ir/bitstream/1783.1-7983/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

27. Cazalas, Edward Jay. Radiation Sensitivity of Graphene Field Effect Transistors and Other Thin Film Architectures.

Degree: PhD, Nuclear Engineering, 2014, Penn State University

URL: https://etda.libraries.psu.edu/catalog/24270

► An important contemporary motivation for advancing radiation detection science and technology is the need for interdiction of nuclear and radiological materials, which may be used… (more)

▼ An important contemporary motivation for advancing radiation detection science and technology is the need for interdiction of nuclear and radiological materials, which may be used to fabricate weapons of mass destruction. The detection of such materials by nuclear techniques relies on achieving high sensitivity and selectivity to X-rays, gamma-rays, and neutrons. To be attractive in field deployable instruments, it is desirable for detectors to be lightweight, inexpensive, operate at low voltage, and consume low power. To address the relatively low particle flux in most passive measurements for nuclear security applications, detectors scalable to large areas that can meet the high absolute detection efficiency requirements are needed. Graphene-based and thin-film-based radiation detectors represent attractive technologies that could meet the need for inexpensive, low-power, size-scalable detection architectures, which are sensitive to X-rays, �gamma-rays, and neutrons. The utilization of graphene to detect ionizing radiation relies on the modulation of graphene charge carrier density by changes in local electric field, i.e. the field effect in graphene. Built on the principle of a conventional field effect transistor, the graphene-based field effect transistor (GFET) utilizes graphene as a channel and a semiconducting substrate as an absorber medium with which the ionizing radiation interacts. A radiation interaction event that deposits energy within the substrate creates electron-hole pairs, which modify the electric field and modulate graphene charge carrier density. A detection event in a GFET is therefore measured as a change in graphene resistance or current. Thin (micron-scale) films can also be utilized for radiation detection of thermal neutrons provided nuclides with high neutron absorption cross section are present with appreciable density. Detection in thin-film detectors could be realized through the collection of charge carriers generated within the film by slowing-down of neutron capture reaction products. The objective of this dissertation is to develop, characterize, and optimize novel graphene-based and thin-film radiation detectors. The dissertation includes a review of relevant physics, comprehensive descriptions and discussions of the experimental campaigns that were conducted, computational simulations, and detailed analysis of certain processes occurring in graphene-based and thin-film radiation detectors that significantly affect their response characteristics. Experiments have been conducted to characterize the electrical properties of GFETs and their responsivity to radiation of different types, such as visible, ultraviolet, X-ray, and gamma�-ray photons, and alpha particles. The nature of graphene hysteretic effects under operational conditions has been studied. Spatially dependent sensitivity of GFETs to irradiation has been experimentally investigated using both a focused laser beam and focused X-ray microbeam. A model has been developed that deterministically simulates the mechanisms of…

Subjects/Keywords: graphene; field effect transistor; neutron; detection; radiation; thin film; hysteresis

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cazalas, E. J. (2014). Radiation Sensitivity of Graphene Field Effect Transistors and Other Thin Film Architectures. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/24270

Chicago Manual of Style (16^th Edition):

Cazalas, Edward Jay. “Radiation Sensitivity of Graphene Field Effect Transistors and Other Thin Film Architectures.” 2014. Doctoral Dissertation, Penn State University. Accessed July 16, 2019. https://etda.libraries.psu.edu/catalog/24270.

MLA Handbook (7^th Edition):

Cazalas, Edward Jay. “Radiation Sensitivity of Graphene Field Effect Transistors and Other Thin Film Architectures.” 2014. Web. 16 Jul 2019.

Vancouver:

Cazalas EJ. Radiation Sensitivity of Graphene Field Effect Transistors and Other Thin Film Architectures. [Internet] [Doctoral dissertation]. Penn State University; 2014. [cited 2019 Jul 16]. Available from: https://etda.libraries.psu.edu/catalog/24270.

Council of Science Editors:

Cazalas EJ. Radiation Sensitivity of Graphene Field Effect Transistors and Other Thin Film Architectures. [Doctoral Dissertation]. Penn State University; 2014. Available from: https://etda.libraries.psu.edu/catalog/24270

University of California – Berkeley

28. Galloway, Michelle. Characterization and Applications of a CdZnTe-Based Multimode Imager.

Degree: Nuclear Engineering, 2014, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/92s4p2z6

► Detection of electromagnetic radiation in the form of gamma rays provides a means to discover the presence of nuclear sources and the occurrence of highly-energetic… (more)

▼ Detection of electromagnetic radiation in the form of gamma rays provides a means to discover the presence of nuclear sources and the occurrence of highly-energetic events that occur in our terrestrial and astrophysical environment. The highly penetrative nature ofgamma rays allows for probing into objects and regions that are obscured at other wavelengths. The detection and imaging of gamma rays relies upon an understanding of the ways in which these high-energy photons interact with matter.The applications of gamma-ray detection and imaging are numerous. Astrophysical observation of gamma rays expands our understanding of the Universe in which we live. Terrestrial detection and imaging of gamma rays enable environmental monitoring of radioactivity. This allows for identification and localization of nuclear materials to prevent illicit trafficking and to ultimately protect against harmful acts. Additionally, terrestrial-based detection is essential, for example, in monitoring the widespread contamination within the Fukushima prefecture in Japan as a result of a nuclear power plant accident.This dissertation focusses on the development and characterization of a gamma-ray detection and imaging instrument and explores its capabilities for the aforementioned applications. The High Efficiency Multimode Imager, HEMI, is a prototype instrument that is based on Cadmium Zinc Telluride (CdZnTe) semiconductor detectors. The detectors are arranged in a two-planar configuration to allow for both Compton and coded-aperture imaging. The front plane consists of active detectors in a random mask pattern to serve simultaneously as a coded mask and a Compton scatter plane, thus providing high detection efficiency. The use of multimode imaging extends the energy range to allow for localization of sources with gamma-ray emissions from tens of keV to a few MeV. HEMI was initially developed as a prototype instrument to demonstrate its capabilities for nuclear threat detection, spectroscopy, and imaging. The 96-detector instrument was developed and fully characterized within the laboratory environment, yielding a system energy resolution of 2.4% FWHM at 662 keV, an angular resolution of 9.5 deg. FWHM at 662 keV in Compton mode, and a 10.6 deg. angular resolution in coded aperture mode. After event cuts, the effective area for Compton imaging of the 662 keV photopeak is 0.1 cm ²2. Imaging of point sources in both Compton and coded aperture modes have been demonstrated. The minimum detectable activity of a ¹³⁷Cs at a 20 m distance with 20 seconds of observation time is estimated to be 0.2 mCi in spectral mode and 20 mCi in Compton imaging mode.These performance parameters fulfilled the requirements of the nuclear security program.Following the Fukushima Dai-ichi Nuclear Power Plant accident of March, 2011, efficient methods to assess levels of radioactive contamination over large areas are needed to aid in clean-up efforts. Although a field study was not initially intended for the HEMI prototype, its…

Subjects/Keywords: Nuclear engineering; CdZnTe; Detection; Gamma-ray; HEMI; imager; Radiation

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Galloway, M. (2014). Characterization and Applications of a CdZnTe-Based Multimode Imager. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/92s4p2z6

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Galloway, Michelle. “Characterization and Applications of a CdZnTe-Based Multimode Imager.” 2014. Thesis, University of California – Berkeley. Accessed July 16, 2019. http://www.escholarship.org/uc/item/92s4p2z6.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Galloway, Michelle. “Characterization and Applications of a CdZnTe-Based Multimode Imager.” 2014. Web. 16 Jul 2019.

Vancouver:

Galloway M. Characterization and Applications of a CdZnTe-Based Multimode Imager. [Internet] [Thesis]. University of California – Berkeley; 2014. [cited 2019 Jul 16]. Available from: http://www.escholarship.org/uc/item/92s4p2z6.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Galloway M. Characterization and Applications of a CdZnTe-Based Multimode Imager. [Thesis]. University of California – Berkeley; 2014. Available from: http://www.escholarship.org/uc/item/92s4p2z6

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

UCLA

29. Chen, Qi. Polymer Composites for Radiation Scintillation.

Degree: Materials Science and Engineering, 2012, UCLA

URL: http://www.escholarship.org/uc/item/5jd591ct

► The dissertation is focused on composite scintillating materials for gamma-ray and fast neutron spectroscopy. The inorganic-organic composite scintillators have been successfully fabricated and investigated. By… (more)

Subjects/Keywords: Materials Science; conjugated polymers; gamma; nanocrystals; neutron; radiation detection; scintillator

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chen, Q. (2012). Polymer Composites for Radiation Scintillation. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/5jd591ct

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chen, Qi. “Polymer Composites for Radiation Scintillation.” 2012. Thesis, UCLA. Accessed July 16, 2019. http://www.escholarship.org/uc/item/5jd591ct.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chen, Qi. “Polymer Composites for Radiation Scintillation.” 2012. Web. 16 Jul 2019.

Vancouver:

Chen Q. Polymer Composites for Radiation Scintillation. [Internet] [Thesis]. UCLA; 2012. [cited 2019 Jul 16]. Available from: http://www.escholarship.org/uc/item/5jd591ct.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chen Q. Polymer Composites for Radiation Scintillation. [Thesis]. UCLA; 2012. Available from: http://www.escholarship.org/uc/item/5jd591ct

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Tennessee – Knoxville

30. Hamm, Daniel Shane. Development and Characterization of Lithium Indium Diselenide for Neutron Detection and Imaging Applications.

Degree: 2018, University of Tennessee – Knoxville

URL: https://trace.tennessee.edu/utk_graddiss/4892

► Lithium indium diselenide [LISe] is under development as a single crystal semiconductor detector for neutron detection applications. Enriched in lithium-6, a neutron sensitive isotope, this… (more)

▼ Lithium indium diselenide [LISe] is under development as a single crystal semiconductor detector for neutron detection applications. Enriched in lithium-6, a neutron sensitive isotope, this wide-band gap semiconductor possesses the inherent neutron-gamma discrimination afforded by the thermal neutron capture reaction energy while providing distinct efficiency advantages over lithiated conversion layer detectors. The overarching theme of this work is to characterize the fundamental properties of this material to optimize its performance in neutron detection applications. The work presented here includes the identification of a suitable metallurgical contact for advanced detector fabrication, fundamental electronic property characterization, and proof-of-principle fast neutron imaging performance. Candidate contact materials were deposited through radio frequency magnetron sputtering. The primary metrics used to identify a robust contact were adhesion to the LISe surface and current voltage characteristics. Among the numerous contacts investigated, indium demonstrated the best adhesion properties. Its viability was demonstrated through the fabrication of a pixelated thermal neutron imaging detector (LTNI). Charge generation, transport, and trapping properties were investigated with emphasis on the stability of these properties post-operation in high thermal neutron flux fields. Neutron and alpha spectroscopy, photoinduced current transient spectroscopy, Raman spectroscopy, trap-filled limited voltage, and photoconductivity measurements were used to probe the charge transport and trapping mechanisms. Moderate transport properties were identified with respect to comparable technologies. Defect studies demonstrated that the type and density of defects strongly influenced performance of the detector. Encouraged by the performance of LTNI, an imaging detector was fabricated by coupling a LISe crystal to a 256 x 256 channel Timepix Application Specific Integrated Circuit to maximize spatial resolution. The fast neutron spatial resolution for 9MeV [electron-Volts] neutrons was investigated via a knife edge experiment. The measured efficiency was in agreement with the Evaluated Nuclear Data File cross-section database. The ultimate spatial resolution of the system was determined as 1.55 millimeters via the 10-90% decrease in contrast of the one-dimensional edge spread function. In conclusion, this material has been shown to exhibit suitable properties warranting further development for high efficiency slow neutron applications guided by the results of this work.

Subjects/Keywords: neutron detection; neutron radiography; 6LiInSe2; semiconductor radiation detector; charge carrier transport

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hamm, D. S. (2018). Development and Characterization of Lithium Indium Diselenide for Neutron Detection and Imaging Applications. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/4892

Chicago Manual of Style (16^th Edition):

Hamm, Daniel Shane. “Development and Characterization of Lithium Indium Diselenide for Neutron Detection and Imaging Applications.” 2018. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed July 16, 2019. https://trace.tennessee.edu/utk_graddiss/4892.

MLA Handbook (7^th Edition):

Hamm, Daniel Shane. “Development and Characterization of Lithium Indium Diselenide for Neutron Detection and Imaging Applications.” 2018. Web. 16 Jul 2019.

Vancouver:

Hamm DS. Development and Characterization of Lithium Indium Diselenide for Neutron Detection and Imaging Applications. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2018. [cited 2019 Jul 16]. Available from: https://trace.tennessee.edu/utk_graddiss/4892.

Council of Science Editors:

Hamm DS. Development and Characterization of Lithium Indium Diselenide for Neutron Detection and Imaging Applications. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2018. Available from: https://trace.tennessee.edu/utk_graddiss/4892

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations