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dc.contributor.advisorSmith, Craig F.
dc.contributor.authorCadiente, Jeremy S.
dc.dateJun-15
dc.date.accessioned2015-08-05T23:05:20Z
dc.date.available2015-08-05T23:05:20Z
dc.date.issued2015-06
dc.identifier.urihttp://hdl.handle.net/10945/45821
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.abstractHeavy inorganic oxide and alkali-halide crystals, which previous experimental research has indicated to have fast neutron detection efficiencies well over 40%, were investigated for potential use as highly efficient gamma-neutron radiation detectors. The Monte Carlo N-Particle radiation transport code (MCNP) was used to characterize the radiation interactions in a candidate set of crystals, including Bismuth Germanate (BGO), Lead Tungstate (PWO), Cadmium Tungstate (CWO), Zinc Tungstate (ZWO), Cerium-doped Lutetium-Gadolinium Orthosilicate (LGSO:Ce), and Cerium doped Lutetium-Aluminum Garnet (LuAG:Ce). Specific detection systems proposed and studied in the laboratory were also modeled and assessed. The candidate crystal set proved to be most susceptible to energy deposition from incident gamma quanta below 0.7 MeV and above 4 MeV, most likely due to photoelectric absorption and pair production, respectively. Inelastic and elastic scattering proved to be about 98% of the total neutron interactions from a Plutonium Beryllium (PuBe) neutron source, about a fourth of which were inelastic scattering. Various components of the detector configuration were evaluated in detail. The crystal dimensions and moderation especially affected detector efficiency, which showed potential for detection efficiencies comparable to experimental data.en_US
dc.publisherMonterey, California: Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleModeling and investigation of heavy oxide and alkali-halide scintillators for potential use in neutron and gamma detection systemsen_US
dc.typeThesisen_US
dc.contributor.secondreaderGoorley, Tim
dc.contributor.departmentPhysics
dc.contributor.departmentPhysicsen_US
dc.subject.authorInelastic scatteringen_US
dc.subject.authorneutron radiationen_US
dc.subject.authorgamma radiationen_US
dc.subject.authorinorganic scintillatorsen_US
dc.subject.authorMCNPen_US
dc.subject.authordetection efficiencyen_US
dc.subject.authorneutron detectionen_US
dc.description.serviceEnsign, United States Navyen_US
etd.thesisdegree.nameMaster of Science in Applied Physicsen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineApplied Physicsen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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