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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 14 of 14 for “"Gamma ray detector"”.
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Efficiency calibration of a gamma-ray detector for measuring environmental radiation
… a low-background Hyper Pure Germanium (HPGe) detector system. A critical aspect of such measurements involves calibrating the detector about energy and detection efficiency. The present study details experiment that were carried to determine both energy and efficiency calibrations for various …
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Total-to-peak ratios of high purity germanium gamma ray detector
This study is concerned with the percentage of [gamma]-rays of a certain energy having their energy correctly measured by a high purity Germanium [gamma]-ray detector. The ratio between the total counts and the counts within the energy peak (total-to-peak ratio) is determined for seven energies …
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Cross section measurements for neutron induced reactions on Bi targets using quasi mono-energetic neutron beams of 90 and 140 MeV
… target materials ( 209Bi) were anal-ysed for gamma-ray emission with the available HPGe gamma-ray detector system of the ERL. From the identi_ed radionuclides, their activities were determined and subsequently their production cross sections were calculated. The cross section data found from …
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Measurements of the 2001 April 15 and 2005 January 20 ground -level enhancements by the Milagro water Cerenkov detector
… was originally designed as a very-high-energy gamma-ray detector, but was also sensitive to cosmic rays and high-energy solar particles. Milagro registered ground-level enhancements for the 2001 April 15 and 2005 January 20 solar events during its operation from January 2000 to March 2008, the …
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Development of Monte Carlo models of a gamma-ray nondestructive assay system for nuclear material control and accountability
… and diversion. Nondestructive assay (NDA) via gamma-ray spectrometry is one of the most common methods employed by NMCA programs to determine the amount or composition of SNM. However, accurate gamma-ray NDA of SNM can be difficult in certain scenarios due to the complex distributions and …
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Mapping the gamma-ray distributions of the Magellanic Clouds
The Large Area Telescope aboard the Fermi Gamma-ray Space Telescope is the first gamma-ray detector to observe external star forming galaxies with high enough significance to allow for spatial modeling of their gamma-ray distributions. Detections of the Milky Way by the Energetic Gamma Ray …
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Lifetime measurements of the 2^{+}_{1} states in even-even platinum isotopes with A = 180-186
… Gaussian fitting and GCD methods applied to \gamma-fast timing data taken with LaBr_3(Ce) detectors at the Australian Heavy Ion Accelerator Facility (HIAF) in August and September 2023. The 2^+_1 lifetimes obtained from both the convolution and GCD methods are in agreement, yielding results of …
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Fisher Information in X-ray/Gamma-ray Imaging Instrumentation Design
Signal formation in a photon-counting x-ray/gamma-ray imaging detector is a complex process resulting in detector signals governed by multiple random effects. Recovering maximum possible information about event attributes of interest requires a systematic collection of calibration data and analysis …
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Lifetime measurements of the 2^{+}_{1} states in even-even platinum isotopes with A = 180-186
… Gaussian fitting and GCD methods applied to \gamma-fast timing data taken with LaBr_3(Ce) detectors at the Australian Heavy Ion Accelerator Facility (HIAF) in August and September 2023. The 2^+_1 lifetimes obtained from both the convolution and GCD methods are in agreement, yielding results of …
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Advanced adaptive library for gamma-ray spectrometers
Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2014-04-28T16:46:46Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Kong_Xianliang.docx: 3637946 bytes, checksum: c93870ae591371661924d085ce6541db (MD5) Kong_Xianliang.pdf: 9861947 …
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Fabricating and Tailoring Halide Perovskites for Photovoltaic Applications
… also shows great promise as a photo and gamma ray detector and like the other halide perovskites is known to support halide ion conductivity that contributes to device instability and reduced sensitivity to irradiation. We choose this as a model system to apply concepts from defect …
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Critical assessment of the MEDUSA gamma ray detection system for radon flux measurement on a tailings dam
… the investigation of a new- technique based on gamma ray spectrometry to quantitatively assess the radon flux from the mine tailings dam. The system is called Multi Element Detector for Underwater Sediment Activity (MEDUSA). Initially, this technique was uniquely designed to measure the …
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Development of a semi-autonomous directional and spectroscopic radiation detection mobile platform
… with a single high resolution scintillation detector to quickly survey an area and convey information about local sources of gamma radiation to a remote human operator. This is achieved by surrounding the detector with a lead sheath that blocks all gamma rays except those incident along the …
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A new prompt gamma spectroscopy-based approach for range verification in proton therapy
… in-vivo range monitoring is based on the prompt gammas (PGs) detection from nuclear de-excitation due to beam interactions in the tissue. The adjective prompt reflects the fact that they are emitted just a few pico-nano seconds after the impact of the proton on the target nucleus. The PGs …