Development of a low-background neutron detector array

2021/11/20 by Li, Y. T., Lin, W. P., Gao, B. +14 · 1 citation
#FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Nuclear Experiment (nucl-ex)

paper · doi:10.48550/arxiv.2111.12552

Abstract

A low-background neutron detector array was developed to measure the cross section of the ¹³C(α,n)¹⁶O reaction, which is the neutron source for the s-process in AGB stars, in the Gamow window (E_c.m. = 190 ± 40 keV) at the China Jinping Underground Laboratory (CJPL). The detector array consists of 24 ³He proportional counters embedded in a polyethylene cube. Due to the deep underground location and a borated polyethylene shield around the detector array, a low background of 4.5(2)/hour was achieved. The ⁵¹V(p, n)⁵¹Cr reaction was used to determine the neutron detection efficiency of the array for neutrons with energy E_n

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