+publisher:"University of Notre Dame" +contributor:("Michael Hildreth, Committee Member")

University of Notre Dame

1. Anthony A. Battaglia. Conversion Coefficient Measurements of 176Lu Using ICEBall</h1>.

Degree: Physics, 2015, University of Notre Dame

URL: https://curate.nd.edu/show/47429882r15

► We have studied the multipolarites of several transitions in the nucleus ¹⁷⁶Lu. The synthesis of ¹⁷⁶Lu in stellar environments is through the slow (s-)… (more)

▼ We have studied the multipolarites of several transitions in the nucleus ¹⁷⁶Lu. The synthesis of ¹⁷⁶Lu in stellar environments is through the slow (s-) neutron capture process. The s-process is responsible for the creation of 50% of the heavy elements and 15-20 nuclei in the s-process are s-process branching points. Branching points determine if the synthesis path will η-decay or neutron capture. The branching point ¹⁷⁶Lu is only produced via the s-process only and has both a long-lived ground state (K=7^-) of 37.6 Gy and a short-lived isomeric state (K=0^-) at 3.6 h. There is no direct decay to both the isomer and ground state due to selection rules. However, an intermediate state was found at 839 keV in the K=4^- band and another intermediate state in the K=4⁺ band at 709 keV which communicate to both the isomer and ground state. The communication to both the isomer and ground state through the intermediate states affects the final abundances of ¹⁷⁶Lu in stellar environments which is sensitive to temperature. The experiment was performed at the University of Notre Dame Nuclear Science Laboratory (NSL) using a ¹⁷⁶Yb(p,n) reaction at 7.75 MeV. Gamma-gamma and gamma-electron coincidences were measured for conversion coefficients using the Internal Conversion Electron Ball (ICEBall) array and two HPGe detectors (109% relative efficiency of a 3'x 3’ NaI detector at 1332 keV). ICEBall was upgraded at the NSL for an improved efficiency from 6%-15% over 4pi. A total of 40 conversion coefficients were measured and 35 multipolarities were assigned. 17 new conversion coefficients were measured and the corresponding multipolarities were assigned. Levels and spin assignments in both the K=4⁺ band and K=4^- band were verified in the intermediate states that are important for establishing a thermal equilibrium in the s-process. Advisors/Committee Members: Mark Caprio, Committee Member, Ani Aprahamian, Committee Chair, Michael Hildreth, Committee Member, Maxime Brodeur, Committee Member.

Subjects/Keywords: nuclear structure; conversion electron spectroscopy; 176Lu; gamma ray spectroscopy; nuclear astrophysics; lutetium-176

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APA (6^th Edition):

Battaglia, A. A. (2015). Conversion Coefficient Measurements of 176Lu Using ICEBall</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/47429882r15

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):

Battaglia, Anthony A.. “Conversion Coefficient Measurements of 176Lu Using ICEBall</h1>.” 2015. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/47429882r15.

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

MLA Handbook (7^th Edition):

Battaglia, Anthony A.. “Conversion Coefficient Measurements of 176Lu Using ICEBall</h1>.” 2015. Web. 15 Jan 2021.

Vancouver:

Battaglia AA. Conversion Coefficient Measurements of 176Lu Using ICEBall</h1>. [Internet] [Thesis]. University of Notre Dame; 2015. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/47429882r15.

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

Council of Science Editors:

Battaglia AA. Conversion Coefficient Measurements of 176Lu Using ICEBall</h1>. [Thesis]. University of Notre Dame; 2015. Available from: https://curate.nd.edu/show/47429882r15

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

University of Notre Dame

2. Bryan Ostdiek. Searching for Electroweakino Dark Matter at a Hadron Collider</h1>.

Degree: Physics, 2016, University of Notre Dame

URL: https://curate.nd.edu/show/2801pg1768w

► Supersymmetry with R parity provides a stable dark matter candidate. However, over much of the parameter space, the dark matter candidate does not freeze… (more)

▼ Supersymmetry with R parity provides a stable dark matter candidate. However, over much of the parameter space, the dark matter candidate does not freeze out to the observed relic abundance. One method to achieve the observed relic abundance relies on the co-annihilation of multiple, nearly-degenerate electroweakino states. This so-called well tempering evades traditional collider searches because the compressed spectrum leaves soft decay products. I outline new strategies that takes advantage of this compressed spectrum and estimate its usefulness at the LHC and a future 100 TeV collider. The first strategy is based on final states with missing transverse energy, a photon, and a dilepton pair, \slashed{E}_T + γ + ℓ⁺ℓ^-. This search method performs best when the mass splitting between the heavier neutralinos and the lightest neutralino is less than the Z mass, which is when traditional search strategies break down. Using this new method, I find the LHC could discover a mixed bino-Higgsino with m_\
ilde{χ_2,3⁰} ≤ sssim 190 ~ ≥ v and m_\
ilde{χ_2,3⁰} - m_ilde{χ₁⁰} ∼eq 30~ ≥ v with 600 fb^-1 of 14 TeV data. While the signature of this signal is quite distinct from the backgrounds, triggering is the biggest set-back. Requiring an additional hard jet from initial (or final) state radiation can provide a trigger at the cost of signal rate. I explore the effects of boosting the electroweakinos off a hard jet at a 100~ ev collider; the background leptons and photons recoil proportional to the momentum of the jet, while the signal leptons and photons have momentum proportional to the mass splitting. A 100~ ev collider would provide a unique search strategy where one uses the most energetic machine to look for low energy events. In addition, I also examine an extension to the minimal supersymmetric standard model. This addition adds three SU(2)_L triplet chiral superfields with Y=0,±1 and the superpotential respects a global SU(2)_L \otimes SU(2)_R broken only by the Yukawa interactions. The F terms from these extra fields help raise the mass of the Higgs to the observed value. Meanwhile, if the vacuum mantains the global SU(2)_L \otimes SU(2)_R, up to the ratio of the doublet vacuum expectation values, the ho parameter is protected at tree level. This allows for the triplet scalars to be light which opens the possibility of resonant s-channel funnels to set the observed relic abundance of dark matter. I show over a wide range of parameters that the triplets can help to set the dark matter abundance either through the s-channel funnels or well tempering with the bino. Advisors/Committee Members: Dinshaw Balsara, Committee Member, Chris Kolda, Committee Member, Michael Hildreth, Committee Member, Antonio Delgado, Research Director.

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APA (6^th Edition):

Ostdiek, B. (2016). Searching for Electroweakino Dark Matter at a Hadron Collider</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/2801pg1768w

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):

Ostdiek, Bryan. “Searching for Electroweakino Dark Matter at a Hadron Collider</h1>.” 2016. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/2801pg1768w.

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

MLA Handbook (7^th Edition):

Ostdiek, Bryan. “Searching for Electroweakino Dark Matter at a Hadron Collider</h1>.” 2016. Web. 15 Jan 2021.

Vancouver:

Ostdiek B. Searching for Electroweakino Dark Matter at a Hadron Collider</h1>. [Internet] [Thesis]. University of Notre Dame; 2016. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/2801pg1768w.

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

Council of Science Editors:

Ostdiek B. Searching for Electroweakino Dark Matter at a Hadron Collider</h1>. [Thesis]. University of Notre Dame; 2016. Available from: https://curate.nd.edu/show/2801pg1768w

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

University of Notre Dame

3. Louis James Antonelli. A Search for the Higgs Boson Decaying to Tau Pairs at the CMS Experiment</h1>.

Degree: Physics, 2012, University of Notre Dame

URL: https://curate.nd.edu/show/hd76rx93b4r

► This thesis describes an experimental search for the Higgs boson. The search has been carried out at the Compact Muon Solenoid experiment using proton-… (more)

Subjects/Keywords: Higgs; CMS; physics; LHC

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APA (6^th Edition):

Antonelli, L. J. (2012). A Search for the Higgs Boson Decaying to Tau Pairs at the CMS Experiment</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/hd76rx93b4r

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):

Antonelli, Louis James. “A Search for the Higgs Boson Decaying to Tau Pairs at the CMS Experiment</h1>.” 2012. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/hd76rx93b4r.

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

MLA Handbook (7^th Edition):

Antonelli, Louis James. “A Search for the Higgs Boson Decaying to Tau Pairs at the CMS Experiment</h1>.” 2012. Web. 15 Jan 2021.

Vancouver:

Antonelli LJ. A Search for the Higgs Boson Decaying to Tau Pairs at the CMS Experiment</h1>. [Internet] [Thesis]. University of Notre Dame; 2012. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/hd76rx93b4r.

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

Council of Science Editors:

Antonelli LJ. A Search for the Higgs Boson Decaying to Tau Pairs at the CMS Experiment</h1>. [Thesis]. University of Notre Dame; 2012. Available from: https://curate.nd.edu/show/hd76rx93b4r

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

University of Notre Dame

4. Douglas R Berry. Evidence of the Higgs Boson Decaying into Two Photons</h1>.

Degree: Physics, 2013, University of Notre Dame

URL: https://curate.nd.edu/show/hd76rx93b3d

► A search for the standard model Higgs boson decaying to two photons will be presented. The analysis will cover 5.1 fb^-1 and 19.6 fb^-1… (more)

Subjects/Keywords: CMS; Higgs; LHC; Particle Physics; Physics; Higgs Boson; Photon

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APA (6^th Edition):

Berry, D. R. (2013). Evidence of the Higgs Boson Decaying into Two Photons</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/hd76rx93b3d

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):

Berry, Douglas R. “Evidence of the Higgs Boson Decaying into Two Photons</h1>.” 2013. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/hd76rx93b3d.

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

MLA Handbook (7^th Edition):

Berry, Douglas R. “Evidence of the Higgs Boson Decaying into Two Photons</h1>.” 2013. Web. 15 Jan 2021.

Vancouver:

Berry DR. Evidence of the Higgs Boson Decaying into Two Photons</h1>. [Internet] [Thesis]. University of Notre Dame; 2013. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/hd76rx93b3d.

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

Council of Science Editors:

Berry DR. Evidence of the Higgs Boson Decaying into Two Photons</h1>. [Thesis]. University of Notre Dame; 2013. Available from: https://curate.nd.edu/show/hd76rx93b3d

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

University of Notre Dame

5. Julie Torborg. The Charge Asymmetry in W Bosons Produced in Proton-Antiproton Collisions at Center-of-Mass Energy 1.96 TeV</h1>.

Degree: Physics, 2005, University of Notre Dame

URL: https://curate.nd.edu/show/1g05fb50z17

► The primary mode of production of W+ bosons in a proton-antiproton collider is u + anti-d -> W+. The u quark generally carries more… (more)

Subjects/Keywords: W Boson; QCD; Charge Asymmetry; Parton Distribution Functions; Electroweak

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APA (6^th Edition):

Torborg, J. (2005). The Charge Asymmetry in W Bosons Produced in Proton-Antiproton Collisions at Center-of-Mass Energy 1.96 TeV</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/1g05fb50z17

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):

Torborg, Julie. “The Charge Asymmetry in W Bosons Produced in Proton-Antiproton Collisions at Center-of-Mass Energy 1.96 TeV</h1>.” 2005. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/1g05fb50z17.

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

MLA Handbook (7^th Edition):

Torborg, Julie. “The Charge Asymmetry in W Bosons Produced in Proton-Antiproton Collisions at Center-of-Mass Energy 1.96 TeV</h1>.” 2005. Web. 15 Jan 2021.

Vancouver:

Torborg J. The Charge Asymmetry in W Bosons Produced in Proton-Antiproton Collisions at Center-of-Mass Energy 1.96 TeV</h1>. [Internet] [Thesis]. University of Notre Dame; 2005. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/1g05fb50z17.

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

Council of Science Editors:

Torborg J. The Charge Asymmetry in W Bosons Produced in Proton-Antiproton Collisions at Center-of-Mass Energy 1.96 TeV</h1>. [Thesis]. University of Notre Dame; 2005. Available from: https://curate.nd.edu/show/1g05fb50z17

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

University of Notre Dame

6. Igor Frota de Vasconcelos. X-Ray Absorption Fine Structure Spectroscopy and Molecular Dynamics Modeling Studies of Ion Adsorption to Kaolinite Clay Surfaces</h1>.

Degree: Physics, 2006, University of Notre Dame

URL: https://curate.nd.edu/show/6h440r9861b

► We used x-ray absorption fine structure spectroscopy to study the local molecular environment of cadmium adsorbed to kaolinite at various pHs and aqueous cadmium… (more)

▼ We used x-ray absorption fine structure spectroscopy to study the local molecular environment of cadmium adsorbed to kaolinite at various pHs and aqueous cadmium concentrations. Quantitative analysis of samples with aqueous cadmium concentration of 100 uM and at pH 7 shows a single hydration sphere around cadmium, suggesting the formation of outer sphere sorption complexes. At pH 9, a clear Cd-M coordination (where M stands for either Si or Al) at second shell distance indicates the formation of inner sphere sorption complexes on the edge sites. The possibility of precipitation of cadmium in the form of solid phases was ruled out due to similar local environment around cadmium in samples prepared under air and nitrogen atmospheres, and by the absence of a Cd-Cd coordination found in the analysis of a 1000 uM sample. Finally, analysis of samples with cadmium aqueous concentration of 3 uM, 10 uM, and 100 uM at pH 9 suggests the formation of inner sphere complexes adsorbed to both silanol and aluminol edge sites in different ratios. In addition, we used molecular dynamics simulation to study the mechanisms envolved in the adsorption of various ions to the basal surfaces of kaolinite. Analysis of simulation data indicates that cations and anions adsorb preferably on the siloxane and gibbsite surfaces of kaolinite, respectively. We observed strong inner sphere adsorption of chlorine at aluminum vacancies on the gibbsite surface and the occurrence of chlorine-driven inner sphere adsorption of cesium and sodium on the gibbsite surface for high ionic strengths. Cesium ions form strong inner sphere complexes at ditrigonal cavities on the siloxane surface. Outer sphere cesium is highly mobile and only weak adsorption may occur. A small amount of sodium adsorbs on the siloxane surface as inner sphere complexes at diffuse sites. Like cesium, sodium onlys forms very weak outer sphere complexes on this surface. Inner sphere complexes of cadmium and lead do not occur on either surface. Relatively strong outer sphere cadmium and lead complexes are present on the siloxane surface at ditrigonal cavities. Advisors/Committee Members: Bruce Bunker, Committee Chair, Morten Eskildsen, Committee Member, Michael Hildreth, Committee Member, Gordon Berry, Committee Member.

Subjects/Keywords: XAFS; Kaolinite; Adsorption; Molecular Dynamics

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APA (6^th Edition):

Vasconcelos, I. F. d. (2006). X-Ray Absorption Fine Structure Spectroscopy and Molecular Dynamics Modeling Studies of Ion Adsorption to Kaolinite Clay Surfaces</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/6h440r9861b

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):

Vasconcelos, Igor Frota de. “X-Ray Absorption Fine Structure Spectroscopy and Molecular Dynamics Modeling Studies of Ion Adsorption to Kaolinite Clay Surfaces</h1>.” 2006. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/6h440r9861b.

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

MLA Handbook (7^th Edition):

Vasconcelos, Igor Frota de. “X-Ray Absorption Fine Structure Spectroscopy and Molecular Dynamics Modeling Studies of Ion Adsorption to Kaolinite Clay Surfaces</h1>.” 2006. Web. 15 Jan 2021.

Vancouver:

Vasconcelos IFd. X-Ray Absorption Fine Structure Spectroscopy and Molecular Dynamics Modeling Studies of Ion Adsorption to Kaolinite Clay Surfaces</h1>. [Internet] [Thesis]. University of Notre Dame; 2006. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/6h440r9861b.

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

Council of Science Editors:

Vasconcelos IFd. X-Ray Absorption Fine Structure Spectroscopy and Molecular Dynamics Modeling Studies of Ion Adsorption to Kaolinite Clay Surfaces</h1>. [Thesis]. University of Notre Dame; 2006. Available from: https://curate.nd.edu/show/6h440r9861b

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

University of Notre Dame

7. Sergio Jesus Almaraz Calderon. Study of Resonances in Light Nuclei for Nuclear Structure and Nuclear Astrophysics</h1>.

Degree: Physics, 2011, University of Notre Dame

URL: https://curate.nd.edu/show/tm70ms38984

► Resonances in exotic nuclei play a central role in the nucleosynthesis processes occurring in the stars. Nuclear reactions proceed through resonance states in exotic… (more)

▼ Resonances in exotic nuclei play a central role in the nucleosynthesis processes occurring in the stars. Nuclear reactions proceed through resonance states in exotic nuclei. This dissertation reports on measurements of resonances in 18Ne, 30S and 9Be. The radioactive nucleus 18Ne was studied via the 16O(3He,n) reaction. These resonances are relevant in understanding one of the two breakout paths from the Hot Carbon-Oxygen-Nitrogen (HCNO) cycle. Neutrons from this reaction were measured in coincidence with charged particles from the decay of resonances in 18Ne to directly extract the charged particle branching ratios of the populated resonance states. Significant α branching ratios coming from the resonances at Eex = 7.95 MeV and Eex = 8.09 MeV were measured for the first time. Evidence of an exotic 2p decay is indicated from the state at Eex$ = 6.15 MeV. The results from this work allows for a more reliable calculation of the 14O(α,p)17F reaction rate, central in the breakout of the HCNO cycle and in the direct competition between α αp-process and the rp-process for the flow of nuclear material in the proton rich side of the valley of stability. The exotic nucleus 30S was studied via the 28Si 3He,n transfer reaction. Neutrons from this reaction were measured in coincidence with charged particle decays from the populated resonance states in 30S. Several states above Eex = 8.5 MeV are reported for the first time. For the states measured between the proton decay threshold and the alpha decay threshold, the branching ratios were extracted and used to tentatively assign spins and parities. The results led to the determination of the first experimental 26Si (α,p)29P reaction rate. The calculated reaction rate is compared with statistical methods traditionally used in the calculations of such reaction rate. The results of the present work will be combined with the results of the 32S(p,t) experiment carried out by O'Brien. Resonance states with Isospin T = 3/2 in 9Be were studied by bombarding a C2H4 target with radioactive 8Li beam using the hybrid Thick/Thin Target in Inverse Kinematics approach. The elastic and inelastic excitation function of 8Li+p were measured in the energy region of 1.0 to 2.8 MeV in the center-of-momentum system. The population of T = 3/2 states in 9Be was confirmed. The parameters of the resonances observed 5/2- and 3/2- correspond to the expected values based on the knowledge of the structure of 9C and 9Li. No Isospin violating channels were necessary to reproduce the 8Li+p excitation function which validates the assumption that the T = ½ states are suppressed due to the multiple open neutron decay channels into the T = 0 states in 8Be. These results will be used to test predictions of ab-initio calculations made for A = 9 nuclei. The results will also be compared with Continuum Shell Model calculations. A firmer foundation to the method employed in this work to study neutron… Advisors/Committee Members: Michael Wiescher, Committee Member, Michael Hildreth, Committee Member, Ani Aprahamian, Committee Chair, Xiao-Dong Tang, Committee Member.

Subjects/Keywords: radioactive beams; nuclear physics; nuclear reactions; nuclear astrophysics

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APA (6^th Edition):

Calderon, S. J. A. (2011). Study of Resonances in Light Nuclei for Nuclear Structure and Nuclear Astrophysics</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/tm70ms38984

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):

Calderon, Sergio Jesus Almaraz. “Study of Resonances in Light Nuclei for Nuclear Structure and Nuclear Astrophysics</h1>.” 2011. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/tm70ms38984.

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

MLA Handbook (7^th Edition):

Calderon, Sergio Jesus Almaraz. “Study of Resonances in Light Nuclei for Nuclear Structure and Nuclear Astrophysics</h1>.” 2011. Web. 15 Jan 2021.

Vancouver:

Calderon SJA. Study of Resonances in Light Nuclei for Nuclear Structure and Nuclear Astrophysics</h1>. [Internet] [Thesis]. University of Notre Dame; 2011. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/tm70ms38984.

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

Council of Science Editors:

Calderon SJA. Study of Resonances in Light Nuclei for Nuclear Structure and Nuclear Astrophysics</h1>. [Thesis]. University of Notre Dame; 2011. Available from: https://curate.nd.edu/show/tm70ms38984

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

University of Notre Dame

8. Aaron Michael Stuckey. X-Ray Studies of Mn Doped Iii-V Materials</h1>.

Degree: Physics, 2005, University of Notre Dame

URL: https://curate.nd.edu/show/47429882q9m

► Two x-ray techniques have been employed to study two classes of semiconductors. X-ray Absorption Fine-structure Spectroscopy (XAFS) was used to examine the Mn environment… (more)

▼ Two x-ray techniques have been employed to study two classes of semiconductors. X-ray Absorption Fine-structure Spectroscopy (XAFS) was used to examine the Mn environment in the dilute magnetic semiconductors Ga1-xMnxAs and Ga(1-x-y)Mn(x)Be(y)As. X-ray reflectivity was used to characterize the structure of InMnAs heterostructures and InAlP oxide films. XAFS measurements of the Mn local environment were performed in order to match structural parameters such as coordination numbers, bond lengths, and XAFS Debye-Waller factors to the ferromagnetic properties of the materials. The Mn local environment in Ga(1-x)Mn(x)As materials with x = 0.01, 0.03, 0.05, and 0.08 was found to be that of a Mn ion substituting for a Ga ion in the GaAs lattice (MnGa). The Mn local environment of the Ga(1-x-y)Mn(x)Be(y)As materials was also measured for six samples with constant x = 0.05 and y = 0.0, 0.01, 0.03, 0.05, 0.08 and 0.11. The Mn local environment depended upon the concentration of Be in the material. At y = 0.0 and y = 0.01 the Mn local environment was found to be that of the MnGa site. The percentage of Mn in this local environment decreased as the Be concentration of the samples increased. Meanwhile, the percentage of Mn in an interstitial site and the percentage of Mn in a precipitate MnAs site both increased. No evidence of Mn-Mn or Mn-Be pairing was found in the Ga(1-x-y)Mn(x)Be_(y)As materials. The x-ray reflectivity measurements were used to characterize the structure of InMnAs and InAlP in order to improve understanding of the structural characteristics. This improvement can then be used to improve the growth parameters in order to create materials upon which device development may be undertaken. The InMnAs materials were found to have a structure closely matching the expectations from growth with the addition of a surface water film. The InAlP oxide films were found to have an additional layer at the interface between the substrate and the oxide film which has higher electron density than the oxide film and large roughness. This layer could be a precipitate layer based upon the thickness of the layer and its roughness. Advisors/Committee Members: Jacek Furdyna, Committee Member, Michael Hildreth, Committee Member, Frank Collings, Committee Chair, Malgorzata Dobrowolska, Committee Member, Bruce A. Bunker, Committee Member.

Subjects/Keywords: GaMnAs; XAFS; X-ray Reflectivity

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APA (6^th Edition):

Stuckey, A. M. (2005). X-Ray Studies of Mn Doped Iii-V Materials</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/47429882q9m

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):

Stuckey, Aaron Michael. “X-Ray Studies of Mn Doped Iii-V Materials</h1>.” 2005. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/47429882q9m.

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

MLA Handbook (7^th Edition):

Stuckey, Aaron Michael. “X-Ray Studies of Mn Doped Iii-V Materials</h1>.” 2005. Web. 15 Jan 2021.

Vancouver:

Stuckey AM. X-Ray Studies of Mn Doped Iii-V Materials</h1>. [Internet] [Thesis]. University of Notre Dame; 2005. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/47429882q9m.

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

Council of Science Editors:

Stuckey AM. X-Ray Studies of Mn Doped Iii-V Materials</h1>. [Thesis]. University of Notre Dame; 2005. Available from: https://curate.nd.edu/show/47429882q9m

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

University of Notre Dame

9. Georgios Magkotsios. Nucleosynthesis During Freeze-Out Expansions in Core-Collapse Supernovae</h1>.

Degree: Physics, 2011, University of Notre Dame

URL: https://curate.nd.edu/show/kp78gf08q6p

► We identify two basic families of isotopes in the mass range 12 <= A <= 122 produced during freeze-out expansions near the mass-cut of… (more)

Subjects/Keywords: ti44; radioactivity; fe60; supernova; al26; nucleosynthesis

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APA (6^th Edition):

Magkotsios, G. (2011). Nucleosynthesis During Freeze-Out Expansions in Core-Collapse Supernovae</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/kp78gf08q6p

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):

Magkotsios, Georgios. “Nucleosynthesis During Freeze-Out Expansions in Core-Collapse Supernovae</h1>.” 2011. Thesis, University of Notre Dame. Accessed January 15, 2021. https://curate.nd.edu/show/kp78gf08q6p.

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

MLA Handbook (7^th Edition):

Magkotsios, Georgios. “Nucleosynthesis During Freeze-Out Expansions in Core-Collapse Supernovae</h1>.” 2011. Web. 15 Jan 2021.

Vancouver:

Magkotsios G. Nucleosynthesis During Freeze-Out Expansions in Core-Collapse Supernovae</h1>. [Internet] [Thesis]. University of Notre Dame; 2011. [cited 2021 Jan 15]. Available from: https://curate.nd.edu/show/kp78gf08q6p.

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

Council of Science Editors:

Magkotsios G. Nucleosynthesis During Freeze-Out Expansions in Core-Collapse Supernovae</h1>. [Thesis]. University of Notre Dame; 2011. Available from: https://curate.nd.edu/show/kp78gf08q6p

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

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