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Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux
Journal article   Open access  Peer reviewed

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

Qinghui Shao, Adam M. Conway, Lars F. Voss, Radoslav P. Radev, Rebecca J. Nikolić, Mushtaq A. Dar, Chin L. Cheung and Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, Vol.799(C), pp.203-206
01/11/2015
DOI: https://doi.org/10.1016/j.nima.2015.07.045

Abstract

Boron Gamma-ray discrimination Silicon pillar Thermal neutron detector
In this paper, we demonstrate a detector that has a high neutron-to-gamma discrimination of 8.5×105 with a high thermal neutron detection efficiency of 39% when exposed to a high gamma-ray field of 109 photons/cm2s. The detector is based on a silicon pillar structure filled with a neutron converter material (10B) designed to have high thermal neutron detection efficiency. The pillar dimensions are 50µm pillar height, 2µm pillar diameter and 2µm spacing between adjacent pillars.
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https://doi.org/10.1016/j.nima.2015.07.045View
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