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

doi:10.1016/j.nima.2015.07.045

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

Chemistry

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	203-206
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	799
DOIs	https://doi.org/10.1016/j.nima.2015.07.045
State	Published - Nov 1 2015

Keywords

Boron
Gamma-ray discrimination
Silicon pillar
Thermal neutron detector

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/j.nima.2015.07.045

Cite this

Shao, Q., Conway, A. M., Voss, L. F., Radev, R. P., Nikolić, R. J., Dar, M. A., & Cheung, C. L. (2015). Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 799, 203-206. https://doi.org/10.1016/j.nima.2015.07.045

Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux. / Shao, Qinghui; Conway, Adam M.; Voss, Lars F. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 799, 01.11.2015, p. 203-206.

Research output: Contribution to journal › Article › peer-review

Shao, Q, Conway, AM, Voss, LF, Radev, RP, Nikolić, RJ, Dar, MA & Cheung, CL 2015, 'Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 799, pp. 203-206. https://doi.org/10.1016/j.nima.2015.07.045

Shao Q, Conway AM, Voss LF, Radev RP, Nikolić RJ, Dar MA et al. Experimental determination of gamma-ray discrimination in pillar-structured thermal neutron detectors under high gamma-ray flux. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2015 Nov 1;799:203-206. doi: 10.1016/j.nima.2015.07.045

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abstract = "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.",

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AU - Nikolić, Rebecca J.

AU - Dar, Mushtaq A.

AU - Cheung, Chin L.

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

Abstract

Keywords

ASJC Scopus subject areas

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