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Title: Pulse shape discrimination in helium-4 scintillation detectors

In this study, we investigated three algorithms for discriminating between neutrons and gamma rays in a pressurized 4He gas fast neutron detector: charge comparison, weighted integration, and neutron-gamma model analysis (NGMA). And for each algorithm, a comprehensive pulse shape discrimination study was conducted using time-of-flight measurements, receiver operator characteristic curves, figure of merit performance measures, and a comparison of performance between 252Cf and PuBe mixed neutron/gamma sources. The NGMA method was found to have the best overall performance by both the figure of merit and the receiver operator characteristic curve. Finally, our results also illustrated the high gamma rejection efficiency of these detectors, which is desirable in a variety of neutron monitoring applications.
Authors:
 [1] ;  [1] ;  [1]
  1. Univ. of Florida, Gainesville, FL (United States)
Publication Date:
Grant/Contract Number:
NA0002534
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 830; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Gas Scintillation Detector; Neutron Detection; Pulse Shape Discrimination; Figure of Merit
OSTI Identifier:
1487079

Kelley, Ryan P., Enqvist, Andreas, and Jordan, Kelly A.. Pulse shape discrimination in helium-4 scintillation detectors. United States: N. p., Web. doi:10.1016/j.nima.2016.05.065.
Kelley, Ryan P., Enqvist, Andreas, & Jordan, Kelly A.. Pulse shape discrimination in helium-4 scintillation detectors. United States. doi:10.1016/j.nima.2016.05.065.
Kelley, Ryan P., Enqvist, Andreas, and Jordan, Kelly A.. 2016. "Pulse shape discrimination in helium-4 scintillation detectors". United States. doi:10.1016/j.nima.2016.05.065. https://www.osti.gov/servlets/purl/1487079.
@article{osti_1487079,
title = {Pulse shape discrimination in helium-4 scintillation detectors},
author = {Kelley, Ryan P. and Enqvist, Andreas and Jordan, Kelly A.},
abstractNote = {In this study, we investigated three algorithms for discriminating between neutrons and gamma rays in a pressurized 4He gas fast neutron detector: charge comparison, weighted integration, and neutron-gamma model analysis (NGMA). And for each algorithm, a comprehensive pulse shape discrimination study was conducted using time-of-flight measurements, receiver operator characteristic curves, figure of merit performance measures, and a comparison of performance between 252Cf and PuBe mixed neutron/gamma sources. The NGMA method was found to have the best overall performance by both the figure of merit and the receiver operator characteristic curve. Finally, our results also illustrated the high gamma rejection efficiency of these detectors, which is desirable in a variety of neutron monitoring applications.},
doi = {10.1016/j.nima.2016.05.065},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 830,
place = {United States},
year = {2016},
month = {5}
}