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You searched for subject:(Xenon Isotopes Measurement). Showing records 1 – 2 of 2 total matches.

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1. Alemayehu, Bemnet. Real-time radioxenon measurement using a Compton-suppressed well-type phoswich detector for nuclear explosion monitoring.

Degree: PhD, Radiation Health Physics, 2013, Oregon State University

Radioxenon detection is a technique used to monitor nuclear explosion and verify the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Because of an ultra-low concentration of radioxenon at radioxenon monitoring stations, radioxenon detection systems must have high sensitivity. This sensitivity is measured in terms of detector's minimum detectable concentration (MDC). It is required that radioxenon monitoring systems should have a MDC of less than or equal to 1 mBq/m³ for ¹³³Xe. A Well-type Actively Shielded Phoswich Detector (WASPD) for radioxenon detection was designed and assembled at the Radiation Detection and Dosimetry lab at Oregon State University. The active shielding mechanism is integrated into the phoswich detector to improve the MDC of the radioxenon by reducing unwanted background events. Anode pulses were processed using a user programmable digital pulse processor. All digital processing functions were implemented in a FPGA device in real-time. The detector was characterized for different radioxenon isotopes. MDC calculation of the detector showed that the results are close or below 1 mBq/m³ for all radioxenon isotopes. Advisors/Committee Members: Farsoni, Abdollah T. (advisor), Hamby, David M. (committee member).

Subjects/Keywords: Digital pulse shape discrimination; Xenon  – Isotopes  – Measurement

…radioactive noble gases released in nuclear explosions, four xenon isotopes (Radioxenon)… …code for FCR-SCR pulse shape discrimination and energy measurement… …measurement… …25 Fig. 2.14: Result of the pulse shape discrimination method for xenon pulses… …41 Table 3.5: Energy resolution measurement of 109Cd and 137Cs using the FCR-SCR and least… 

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APA (6th Edition):

Alemayehu, B. (2013). Real-time radioxenon measurement using a Compton-suppressed well-type phoswich detector for nuclear explosion monitoring. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/42388

Chicago Manual of Style (16th Edition):

Alemayehu, Bemnet. “Real-time radioxenon measurement using a Compton-suppressed well-type phoswich detector for nuclear explosion monitoring.” 2013. Doctoral Dissertation, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/42388.

MLA Handbook (7th Edition):

Alemayehu, Bemnet. “Real-time radioxenon measurement using a Compton-suppressed well-type phoswich detector for nuclear explosion monitoring.” 2013. Web. 01 Mar 2021.

Vancouver:

Alemayehu B. Real-time radioxenon measurement using a Compton-suppressed well-type phoswich detector for nuclear explosion monitoring. [Internet] [Doctoral dissertation]. Oregon State University; 2013. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/42388.

Council of Science Editors:

Alemayehu B. Real-time radioxenon measurement using a Compton-suppressed well-type phoswich detector for nuclear explosion monitoring. [Doctoral Dissertation]. Oregon State University; 2013. Available from: http://hdl.handle.net/1957/42388

2. Haas, Derek Anderson, 1981-. Production of [beta-gamma] coincidence spectra of individual radioxenon isotopes for improved analysis of nuclear explosion monitoring data.

Degree: PhD, Mechanical Engineering, 2008, University of Texas – Austin

Radioactive xenon gas is a fission product released in the detonation of nuclear devices that can be detected in atmospheric samples far from the detonation site. In order to improve the capabilities of radioxenon detection systems, this work produces [beta-gamma] coincidence spectra of individual isotopes of radioxenon. Previous methods of radioxenon production consisted of the removal of mixed isotope samples of radioxenon gas released from fission of contained fissile materials such as ²³⁵U. In order to produce individual samples of the gas, isotopically enriched stable xenon gas is irradiated with neutrons. The detection of the individual isotopes is also modeled using Monte Carlo simulations to produce spectra. The experiment shows that samples of [superscript 131m]Xe, ¹³³Xe, and ¹³⁵Xe with a purity greater than 99% can be produced, and that a sample of [superscript 133m]Xe can be produced with a relatively low amount of ¹³³Xe background. These spectra are compared to models and used as essential library data for the Spectral Deconvolution Analysis Tool (SDAT) to analyze atmospheric samples of radioxenon for evidence of nuclear events. Advisors/Committee Members: Biegalski, Steven R. (advisor).

Subjects/Keywords: Xenon – Isotopes – Spectra; Xenon – Isotopes – Spectra – Computer simulation; Neutron irradiation; Radioactivity – Measurement – Computer simulation; Nuclear counters; Monte Carlo method – Computer programs

…most likely sources, 235U and 239 Pu, is xenon. The four radioactive isotopes of xenon… …isotopes reach the surface as xenon gas, and long enough that they are significantly radioactive… …radioxenon isotopes of interest. [5]… …24 Table 3.2. Purity of enriched stable xenon gases… …77 Table 7.1. Ratio of 133mXe to other radioxenon isotopes using various methods of… 

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Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Haas, Derek Anderson, 1. (2008). Production of [beta-gamma] coincidence spectra of individual radioxenon isotopes for improved analysis of nuclear explosion monitoring data. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/18097

Chicago Manual of Style (16th Edition):

Haas, Derek Anderson, 1981-. “Production of [beta-gamma] coincidence spectra of individual radioxenon isotopes for improved analysis of nuclear explosion monitoring data.” 2008. Doctoral Dissertation, University of Texas – Austin. Accessed March 01, 2021. http://hdl.handle.net/2152/18097.

MLA Handbook (7th Edition):

Haas, Derek Anderson, 1981-. “Production of [beta-gamma] coincidence spectra of individual radioxenon isotopes for improved analysis of nuclear explosion monitoring data.” 2008. Web. 01 Mar 2021.

Vancouver:

Haas, Derek Anderson 1. Production of [beta-gamma] coincidence spectra of individual radioxenon isotopes for improved analysis of nuclear explosion monitoring data. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2008. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2152/18097.

Council of Science Editors:

Haas, Derek Anderson 1. Production of [beta-gamma] coincidence spectra of individual radioxenon isotopes for improved analysis of nuclear explosion monitoring data. [Doctoral Dissertation]. University of Texas – Austin; 2008. Available from: http://hdl.handle.net/2152/18097

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