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Title: Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux

Abstract

Silicon pillar structures filled with a neutron converter material (10B) are designed to have high thermal neutron detection efficiency with specific dimensions of 50 μm pillar height, 2 μm pillar diameter and 2 μm spacing between adjacent pillars. In this paper, we have demonstrated such a detector has a high neutron-to-gamma discrimination of 106 with a high thermal neutron detection efficiency of 39% when exposed to a high gamma-ray field of 109 photons/cm2s.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [3]
+ Show Author Affiliations
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. King Saud Univ., Riyadh (Saudi Arabia)
  3. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Chemistry
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE; US Department of Homeland Security (DHS), Domestic Nuclear Detection Office
OSTI Identifier:
1237544
Alternate Identifier(s):
OSTI ID: 1247195
Report Number(s):
LLNL-JRNL-641356
Journal ID: ISSN 0168-9002
Grant/Contract Number:  
AC52-07NA27344; IAA HSHQDC-08-X-00874; LLNL-JRNL-641356
Resource 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: 799; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; Thermal neutron detector; Gamma-ray discrimination; Silicon pillar; Boron

Citation Formats

Shao, Qinghui, Conway, Adam M., Voss, Lars F., Radev, Radoslav P., Nikolić, Rebecca J., Dar, Mushtaq A., and Cheung, Chin L. Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux. United States: N. p., 2015. Web. doi:10.1016/j.nima.2015.07.045.
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Shao, Qinghui, Conway, Adam M., Voss, Lars F., Radev, Radoslav P., Nikolić, Rebecca J., Dar, Mushtaq A., & Cheung, Chin L. Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux. United States. https://doi.org/10.1016/j.nima.2015.07.045
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Shao, Qinghui, Conway, Adam M., Voss, Lars F., Radev, Radoslav P., Nikolić, Rebecca J., Dar, Mushtaq A., and Cheung, Chin L. Tue . "Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux". United States. https://doi.org/10.1016/j.nima.2015.07.045. https://www.osti.gov/servlets/purl/1237544.
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@article{osti_1237544,
title = {Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux},
author = {Shao, Qinghui and Conway, Adam M. and Voss, Lars F. and Radev, Radoslav P. and Nikolić, Rebecca J. and Dar, Mushtaq A. and Cheung, Chin L.},
abstractNote = {Silicon pillar structures filled with a neutron converter material (10B) are designed to have high thermal neutron detection efficiency with specific dimensions of 50 μm pillar height, 2 μm pillar diameter and 2 μm spacing between adjacent pillars. In this paper, we have demonstrated such a detector has a high neutron-to-gamma discrimination of 106 with a high thermal neutron detection efficiency of 39% when exposed to a high gamma-ray field of 109 photons/cm2s.},
doi = {10.1016/j.nima.2015.07.045},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 799,
place = {United States},
year = {Tue Aug 04 00:00:00 EDT 2015},
month = {Tue Aug 04 00:00:00 EDT 2015}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1016/j.nima.2015.07.045
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