Fast-Neutron Detectors Based on Surface-Barrier GaAs Sensors with an Ultrahigh-Molecular-Weight Polyethylene Converter

Sergey V. Chernykh, Alexey V. Chernykh, G. I. Britvich, Aleksandr P Chubenko, N. Burtebayev, D. M. Zazulin, J. Mussayev, R. Khodzhaev, Victor V. Tcherdyntsev, Fedor Svyatoslavovich Senatov

1 more author

Sergey I. Didenko

2019

Closed access Metadata (CSL-JSON)
DOI 10.1134/s0020441219030138
Data confidence 70 medium
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Abstract

Abstract— Surface-barrier structures based on high-purity epitaxial GaAs layers with an ultrahigh-molecular-weight polyethylene converter were tested as fast-neutron detectors. The α-particle spectra and the response to fast neutrons were measured under exposure to a 241Am−Be source. The detectors demonstrated a high neutron-detection efficiency (1.22 × 10−3 counts/neutron) and an acceptable ratio of the signal to γ‑ray background (approximately 40). The possibility of using such detectors at temperatures as high as 120°C was shown.