Evaluation of the thermal neutron sensitivity, output linearity, and gamma-ray response of optical fiber-based neutron detectors using Li-glass scintillator
Evaluation of the thermal neutron sensitivity, output linearity, and gamma-ray response of optical fiber-based neutron detectors using Li-glass scintillator
复制标题
使用锂玻璃闪烁体评估基于光纤的中子探测器的热中子灵敏度、输出线性度和伽马射线响应
DOI：
10.1016/j.nima.2021.166074
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Hideki Harano
中科院分区：
文献类型：
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作者：
Akihisa Ishikawa;Kenichi Watanabe;Astushi Yamazaki;Sachiko Yoshihashi;Shigefumi Imai;Akihiko Masuda;Tetsuro Matsumoto;Hiroki Tanaka;Yoshinori Sakurai;Mitsuhiro Nogami;Keitaro Hitomi;Akira Uritani;Hideki Harano
光纤中子探测器可用于强中子场的实时中子监测。本研究采用锂玻璃闪烁体制作了光纤中子探测器。对其热中子灵敏度、输出线性度上限以及对60Co和Cd的伽马射线响应进行了评价。热中子灵敏度与锂玻璃闪烁体质量成正比，峰谷通道低能级分辨的校正因子分别为2.0 6×10−6和3.18×10−6cps/(n/cm2/S)/μg。探测器的输出线性度达到了近2mcps。在评估60Co和Cd对伽马射线的响应时，发现伽马射线计数率小于大多数预期应用中与计数统计相关的不确定度，在这些应用中，中子计数率为>；1kcps。
An optical fiber-based neutron detector can be used as a real-time neutron monitor for an intense neutron field. In this study, optical fiber-based neutron detectors were fabricated using Li-glass scintillator. The thermal neutron sensitivity, upper limit of the output linearity, and response to gamma rays from 60 Co and Cd were evaluated. The thermal neutron sensitivity was proportional to the mass of the Li-glass scintillator, and the calibration factor was 2.06× 10− 6 and 3.18× 10− 6 cps/(n/cm 2/s)/μ g for the lower-level discrimination of the peak and valley channel, respectively. The detector output linearity was confirmed to be up to nearly 2 Mcps. While evaluating the response to gamma rays, for both 60 Co and Cd, the gamma-ray counting rate was found to be smaller than the uncertainty associated with counting statistics in most expected applications where the neutron counting rate was> 1 kcps.