Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Gamma source"”.
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Development of a Novel Fuel Burnup Methodology and Algorithm in RAPID and its Benchmarking and Automation
… concentrations and intrinsic neutron and gamma source strengths as a function of irradiation and cooling time. Detailed, full-core 3D burnup calculations are critical for nuclear fuel management studies, including core design and spent fuel storage safety and safeguards analysis. For core …
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Simulated pion photoproduction experiments
… in a planned experiment at the High Intensity Gamma Source at Duke University. I will review the relevant theory and set out the importance of this experiment. I will describe the proposed apparatus and how I have modeled it in my simulation. I will explain the data we wish to draw from the …
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Charged Pion Photoproduction Cross Section and Beam Asymmetry Measurement on HD
The charged pion production reactions d(gamma,pi<sup>+</sup>n), d(gamma,pi<sup>-</sup>p), HD(gamma,pi<sup>+</sup>n)X were studied using linearly polarized gamma-rays with energies in the range from 260 MeV to 370 MeV at the Laser Electron Gamma Source (LEGS). A solid HD target was used in this …
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Simulation of a pion photodetection experiment
… in a planned experiment at the High Intensity Gamma Source (HI[gamma]S) at Duke University. After discussing the relevance of the experiment and briefly reviewing the physics at play, we delve into the details of the Crystal Box detector and explain how it is being modeled in the simulation. We …
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Characterization of water-based liquid scintillator response to gammas and neutrons at varying scintillator-surfactant concentrations
… liquid scintillator to Sodium-22 (²²Na) 511 keV gamma source and Americium-24 Beryllium (AmBe) 2-10 MeV neutron source is explored by taking pulse area spectra data at scintillator-surfactant concentrations of 0.5%, 1.0% and 2.0%. An analysis of light yield reveals an increasing linear …
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Synthesis and characterization of cerium-doped lanthanum halide colloidal nanocrystals
… (variation in emission light yield to absorbed gamma energy) for 662 keV gamma rays, 25 ns short decay time, and a density of 5.3 g/cm3 with 22 mm attenuation length for 511 keV gamma rays. However, the crystals are hygroscopic and hence have to be protected from external environment both during …
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Characterization of Radiation Fields and Dose Assessment From Fuels Manufacturing For Advanced Fuel Cycles
… (RepU). Of particular concern is the increase in gamma source term from the daughter products in RepU and the mixed neutron and gamma fields introduced by MA recycle. In the interest of keeping the glovebox worker's radiation dose as low as reasonable achievable (ALARA), dose rates were calculated …
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Study of chemistry and irradiation effects on nanofluids to be used in light water reactor accident cooling
… have been found to be stable under high doses of gamma radiation and in the chemical environment associated with emergency core cooling. However, exposure to tri-sodium phosphate, a chemical used in in-vessel retention systems, resulted in significant agglomeration of nanoparticles. CHF value …
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Examination of secondary electrons generated by encapsulated gamma sources to improve contact dosimetry estimates
… generation on the surface of encapsulated gamma sources can play a large role in the dose measured near the surface of the encapsulation. The National Council on Radiation Protection and Measurements (NCRP) Report - 40 contains contact dose rate conversion factors for encapsulated gamma …
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Yeast-based impedance biodosimetry for retrospective assessment of radiation exposures
… yeast cells from 0:5 Gy to 8 Gy using a ¹³⁷Cs gamma source. The dose-response curve exhibited a linear relationship of dose with changes in the impedance response. Additionally, the lowest detectable dose that could be measured using this methodology was determined to be 300mGy. Fading of the …