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Title Detector Response Simulations of Hydrocarbon Neutron Scintillators
URL
Publication Date
Date Accessioned
Degree MS
Discipline/Department Department of Physics
Degree Level masters
University/Publisher University of Guelph
Abstract DESCANT is a novel neutron detector array for use in nuclear structure and astrophysics studies with radioactive-ion beams. Comprised of 70 hexagonical deuterated scintillation detectors, DESCANT is located at the ISAC facility of TRIUMF, where it can be used in combination with the GRIFFIN or TIGRESS gamma-ray spectrometers in a multitude of nuclear decay and reaction experiments. The deuterated scintillator used in the DESCANT detectors produces a peaked structure in the detector response spectra that can provide neutron energy measurements without using traditional time-of-flight methods. This thesis will present the framework for a comprehensive GEANT4 simulation of the DESCANT array. The capabilities of the G4NeutronHP physics library in accurately reproducing interaction cross-sections below 10 MeV is verified. The G4Scintillation model is then used to investigate the geometric dependence of the light collection process in a single DESCANT detector. This is followed by an extensive study of simulated response functions of two neutron scintillators. The first is a well studied proton-recoil scintillator (NE-213) and the second is a deuteron-recoil scintillator (EJ-315), similar to that which is used by DESCANT. The detector response to mono-energetic neutrons is then measured for the two scintillators using cylindrical detectors with 11.43 cm diameter and 2.54 cm thickness geometries. A parameterization of the light yield is then calculated for both scintillators by conducting a chi-squared minimization between experimental and simulated pulse-height spectra. Finally, the current status of the DESCANT array geometry in GEANT4 is presented.
Subjects/Keywords Neutron detectors; Detector response function; NE-213; EJ-315; DESCANT; Nuclear physics; Deuterated scintillators; Neutron scintillators; GEANT4; Pulse-height spectra
Contributors Garrett, Paul (advisor)
Language en
Rights Attribution 2.5 Canada
http://creativecommons.org/licenses/by/2.5/ca/
All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated. [Always confirm rights and permissions with the source record.]
Country of Publication ca
Record ID handle:10214/11602
Repository guelph
Date Retrieved
Date Indexed 2020-08-13
Created Date 2017-09-12 00:00:00
Issued Date 2017-09-15 00:00:00
Note [sponsorship] The Canadian Foundation for Innovation, The National Research Council of Canada and the Natural Sciences and Engineering Research Council of Canada.;

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