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

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 10 6 with a high thermal neutron detection efficiency of 39% when exposed to a high gamma-ray field of 10 9 photons/cm 2s.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3]
  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:
Report Number(s):
LLNL-JRNL-641356
Journal ID: ISSN 0168-9002
Grant/Contract Number:
AC52-07NA27344; IAA HSHQDC-08-X-00874; LLNL-JRNL-641356
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
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE; US Department of Homeland Security (DHS), Domestic Nuclear Detection Office
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; Thermal neutron detector; Gamma-ray discrimination; Silicon pillar; Boron
OSTI Identifier:
1237544
Alternate Identifier(s):
OSTI ID: 1247195