Numerical simulations of pillar structured solid state thermal neutron detector: Efficiency and gamma discrimination

Adam M. Conway, Tzu F. Wang, Nimanlendu Deo, Chin L. Cheung, Rebecca J. Nikolić

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

This paper reports numerical simulations of a three-dimensionally integrated, Boron-10 (10 B) and Silicon p+, intrinsic, n+ (PIN) diode micropillar array for thermal neutron detection. The inter-digitated device structure has a high probability of interaction between the Si PIN pillars and the charged particles (alpha and 7Li) created from the neutron- 10 B reaction. In this paper, the effect of both the 3-D geometry (including pillar width, separation and height) and energy loss mechanisms are investigated via simulations to predict the neutron detection efficiency and gamma discrimination of this structure. The simulation results are demonstrated to compare well with the experimental data available at this time, for 7- and 12-μm tall micropillar arrays. This indicates that upon scaling the pillar height, a high efficiency thermal neutron detector is possible.

Original languageEnglish (US)
Article number5280550
Pages (from-to)2802-2807
Number of pages6
JournalIEEE Transactions on Nuclear Science
Volume56
Issue number5
DOIs
StatePublished - Oct 2009

Keywords

  • Monte Carlo simulation
  • Neutron detector
  • Semiconductor device modeling
  • Solid state detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

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