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

Research output: Contribution to journalArticle

3 Scopus citations


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 50 μm pillar height, 2 μm pillar diameter and 2 μm spacing between adjacent pillars.

Original languageEnglish (US)
Pages (from-to)203-206
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - Nov 1 2015



  • Boron
  • Gamma-ray discrimination
  • Silicon pillar
  • Thermal neutron detector

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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