Detector Response Simulations of Hydrocarbon Neutron Scintillators.
Degree: MS, Department of Physics, 2017, University of Guelph
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.
Advisors/Committee Members: Garrett, Paul (advisor).
Subjects/Keywords: Neutron detectors; Detector response function; NE-213; EJ-315; DESCANT; Nuclear physics; Deuterated scintillators; Neutron scintillators; GEANT4; Pulse-height spectra
…213 and EJ-315 scintillation detectors. 70
4.10 Pulse-height spectra of 1.5 MeV neutrons in… …x
4.11 Pulse-height spectra indicating the positions used to calculate the light… …74
4.15 Preliminary pulse-height spectra for the proton-recoil scintillator (NE-213… …x29;. .
4.16 Preliminary pulse-height spectra for the deuteron-recoil scintillator… …4.21 χ2 -minimized pulse-height spectra for the proton-recoil scintillator (NE-213)…
to Zotero / EndNote / Reference
APA (6th Edition):
Turko, J. (2017). Detector Response Simulations of Hydrocarbon Neutron Scintillators. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/11602
Chicago Manual of Style (16th Edition):
Turko, Joseph. “Detector Response Simulations of Hydrocarbon Neutron Scintillators.” 2017. Masters Thesis, University of Guelph. Accessed April 12, 2021.
MLA Handbook (7th Edition):
Turko, Joseph. “Detector Response Simulations of Hydrocarbon Neutron Scintillators.” 2017. Web. 12 Apr 2021.
Turko J. Detector Response Simulations of Hydrocarbon Neutron Scintillators. [Internet] [Masters thesis]. University of Guelph; 2017. [cited 2021 Apr 12].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/11602.
Council of Science Editors:
Turko J. Detector Response Simulations of Hydrocarbon Neutron Scintillators. [Masters Thesis]. University of Guelph; 2017. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/11602