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Articles 1 - 5 of 5
Full-Text Articles in Physics
The Study Of Nuclear Structure Of Neutron-Rich 81ge And Its Contribution In The R-Process Via The Neutron Transfer Reaction 80ge(D,P), Sunghoon Ahn
Doctoral Dissertations
The study of low-lying levels of nuclei near closed shells not only elucidates the evolution of nuclear shell structure far from stability, but also affects estimates of heavy element nucleosynthesis in supernova explosions. Especially, the properties of the low-lying levels in 81Ge[Germanium 81] are important because the sensitivity study of the r-process pointed out that the properties of the nucleus can affect the final bundance pattern. Also, the spins and parities measurements of the states are essential to understand the shape coexistence in odd-mass N = 49 isotones.
This work describes the study of the odd-mass N = …
Investigation Of Time And Position Resolved Alpha Transducers For Multi-Modal Imaging With A D-T Neutron Generator, Joshua William Cates
Investigation Of Time And Position Resolved Alpha Transducers For Multi-Modal Imaging With A D-T Neutron Generator, Joshua William Cates
Doctoral Dissertations
Deuterium-Tritium (D-T) neutron generators have been used as an active interrogation source for associated particle imaging (API) techniques. The D-T reaction yields a 14.1 MeV neutron and a 3.5 MeV alpha (or assoicated) particle, projected nearly back-to-back. The kinetics of the reaction allow the direction and initial time of the neutron to be determined utilizing position sensitive detectors for both the alpha and neutron. This information facilitates multi-modal fast neutron imaging of inspection objects and closed containers to infer the geometry within them and the presence of special nuclear material (SNM). Since position and time of interaction of the alpha …
Neutron Scintillation Detectors Based On Polymers Containing Lithium-6 For Radiation Portal Monitor Applications, Andrew Neil Mabe
Neutron Scintillation Detectors Based On Polymers Containing Lithium-6 For Radiation Portal Monitor Applications, Andrew Neil Mabe
Doctoral Dissertations
The work presented herein describes an investigation of four main types of thin film polymer scintillators containing 6Li [lithium-6] for neutron detection: polystyrene containing 6LiF [lithium-6 fluoride] and a preblended fluor mixture comprising 2,5-diphenyloxazole and 1,4-bis(5-phenyloxazol-2-yl)benzene; poly(styrene-co-lithium maleate) containing salicylic acid; poly[styrene-co-lithium maleate-co-2-phenyl-5-(4-vinylphenyl)oxazole]; and poly(styrene-co-lithium 4-vinylbenzoate). A variety of chemical and physical characterizations as well as optical and scintillation characterizations were performed to guide the development of optimized compositions of each type of polymer film. The scintillation performances of optimized compositions of each type of polymer film were calibrated using …
Finding Nuclear Drip Lines And Studying Two Proton Emission, Alexander Matthew Perhac
Finding Nuclear Drip Lines And Studying Two Proton Emission, Alexander Matthew Perhac
Chancellor’s Honors Program Projects
No abstract provided.
Computer Code Verification And Cross Section Calculation For Promethium-147, Rita Inez Zell-Lusk
Computer Code Verification And Cross Section Calculation For Promethium-147, Rita Inez Zell-Lusk
Nuclear Engineering Reports
The goals of this research are to (1) verify the predictions and accuracy of two computer codes which will be utilized in future research on Pm-147 production with data from a previous experiment and to (2) measure the cross section of Pm-147 for single neutron capture producing Pm-148 ground state and Pm-148 metastable state. The research in goal (1) used previous data obtained by James H. Hinderer in 2010 and a sample of Promethium-147 prepared by Rose Boll in 2006. The main elements of the new research done here included a correction of Mr. Hinderer’s data and the subsequent use …