Determination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me V

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dc.contributor.advisorAllie, Saalihen_ZA
dc.contributor.authorHerbert, Marken_ZA
dc.date.accessioned2016-04-05T11:48:32Z
dc.date.available2016-04-05T11:48:32Z
dc.date.issued2009en_ZA
dc.descriptionIncludes bibliographical references. .en_ZA
dc.description.abstractA neutron spectrometer based on an NE230 deuterated organic liquid scintillator (25 mm diameter x 25 mm) has been developed for measuring neutron spectra in water. The spectrometer is capable of measuring neutron energies above 5 MeV, set by the electronic threshold. An important feature of the spectrometer is that it is able to discriminate between recoiling protons that are associated with neutron interactions that take place in the detector from recoiling protons that arise from n-p scattering in the water. The spectrometer was tested by recording pulse height spectra in a water phantom irradiated by neutrons of energy up to ~ 64 MeV. Neutron energy spectra were obtained from the pulse height spectra by Bayesian unfolding with the code MAXED using a response matrix that was determined experimentally. The efficiency of the NE230 detector was determined experimentally relative to an NE213 detector of known efficiency. A series of detailed measurements was taken at positions in the phantom along the axis of the neutron beam while exploratory runs were made off the beam axis. Results from measurements made along the axis of the neutron beam compare well with Monte Carlo calculations using MCNPX.en_ZA
dc.identifier.apacitationHerbert, M. (2009). <i>Determination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me V</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Physics. Retrieved from http://hdl.handle.net/11427/18622en_ZA
dc.identifier.chicagocitationHerbert, Mark. <i>"Determination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me V."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Physics, 2009. http://hdl.handle.net/11427/18622en_ZA
dc.identifier.citationHerbert, M. 2009. Determination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me V. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Herbert, Mark AB - A neutron spectrometer based on an NE230 deuterated organic liquid scintillator (25 mm diameter x 25 mm) has been developed for measuring neutron spectra in water. The spectrometer is capable of measuring neutron energies above 5 MeV, set by the electronic threshold. An important feature of the spectrometer is that it is able to discriminate between recoiling protons that are associated with neutron interactions that take place in the detector from recoiling protons that arise from n-p scattering in the water. The spectrometer was tested by recording pulse height spectra in a water phantom irradiated by neutrons of energy up to ~ 64 MeV. Neutron energy spectra were obtained from the pulse height spectra by Bayesian unfolding with the code MAXED using a response matrix that was determined experimentally. The efficiency of the NE230 detector was determined experimentally relative to an NE213 detector of known efficiency. A series of detailed measurements was taken at positions in the phantom along the axis of the neutron beam while exploratory runs were made off the beam axis. Results from measurements made along the axis of the neutron beam compare well with Monte Carlo calculations using MCNPX. DA - 2009 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2009 T1 - Determination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me V TI - Determination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me V UR - http://hdl.handle.net/11427/18622 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18622
dc.identifier.vancouvercitationHerbert M. Determination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me V. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Physics, 2009 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18622en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Physicsen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherPhysicsen_ZA
dc.titleDetermination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me Ven_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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