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Test of fast neutron detectors for spectroscopy with (3He,n) two proton stripping reactions

dc.contributor.advisorPapka, Paulen_ZA
dc.contributor.advisorLawrie, E. A.en_ZA
dc.contributor.advisorWyngaardt, Shaun M.en_ZA
dc.contributor.authorElbasher, Mohamed Elbasher Ahmeden_ZA
dc.contributor.otherStellenbosch University. Faculty of Science. Dept. of Physics.en_ZA
dc.date.accessioned2012-03-06T11:49:03Zen_ZA
dc.date.accessioned2012-03-30T10:44:43Z
dc.date.available2012-03-06T11:49:03Zen_ZA
dc.date.available2012-03-30T10:44:43Z
dc.date.issued2012-03en_ZA
dc.identifier.urihttp://hdl.handle.net/10019.1/20123
dc.descriptionThesis (MSc)--Stellenbosch University, 2012.en_ZA
dc.description.abstractENGLISH ABSTRACT: Nine 100x100x600 mm3 plastic scintillators, formerly built for the neutron time of ight measurements at iThemba LABS, were refurbished. The position resolution of these detectors was determined using muon cosmic rays and coincident measurement techniques. Average position resolution of 4.28 cm (FWHM) was found. In order to predict the time spectrum of the large-volume detector Monte Carlo simulations have been performed. These simulations aimed at anticipating the separation of statistical neutrons, prompt gamma rays and uncorrelated gamma rays from the fast neutrons emitted in the reaction of interest. One of the neutron detectors was tested using fast neutrons from the 232Th( ,xn) reaction at 42 MeV. Statistical neutrons from fusion evaporation reactions were produced in 152Sm(12C,xn) fusion evaporation reaction. Coincidences between neutrons and gamma rays were successfully identi ed. Prompt gamma rays and uncorrelated gamma rays were also identi ed.en_ZA
dc.description.abstractAFRIKAANSE OPSOMMING: Nege 100x100x600 mm3 plastiese scintillators, wat aanvanklik gebou was vir neutron vlugtyds meetings by iThemba LABS, was hernu. Die posisie resolusie van die detektore was bepaal deurmiddel van muon kosmiese straling en koïnsidensie meet tegnieke. Posisie resolusie van 4.28 cm (FWHM) was verkry. Monte Carlo simulasies is gebruik om die posisie resolusie van'n groot volume detektor te voorspel. Hierdie simulasies is daarop gemik om onderskeid te maak tussen statistiese neutrone, gelyktydige gamma strale en ongekorreleerde gamma strale vanaf vinnige neutrone in die reaksie van belang uitgestraal word. Een neutron detektor was getoets deur gebruik te maak van vinnige neutrone wat uit die reaksie 232Th( ,xn) by 42 MeV ontstaan. Statistiese neutrone vanaf splitsings verdampingsreaksies, gelyktydige gamma strale en ongekorreleerde gamma strale was geidenti seer. Statistiese neutrone van samesmelting verdamping reaksies was geproduseer in die reaksie 152Sm(12C,xn). Toeval tussen neutrone en gamma strale was suksesvol geïdenti seer, gevra gamma strale en ongekorreleerd gamma strale was ook geïdenti seer.af_ZA
dc.format.extent73 p. : ill.
dc.language.isoen_ZAen_ZA
dc.publisherStellenbosch : Stellenbosch Universityen_ZA
dc.subjectNeutron spectroscopyen_ZA
dc.subjectCoincidence measurementsen_ZA
dc.subjectDissertations -- Physicsen_ZA
dc.subjectTheses -- Physicsen_ZA
dc.subjectFast neutron detectorsen_ZA
dc.subjectPlastic scintillation detectorsen_ZA
dc.subjectTime-of-flight simulationsen_ZA
dc.titleTest of fast neutron detectors for spectroscopy with (3He,n) two proton stripping reactionsen_ZA
dc.typeThesis
dc.rights.holderStellenbosch University


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