人工晶体学报, 2021, 50 (10): 1933, 网络出版: 2021-12-06
Cs2LiYCl6∶Ce晶体的n/γ双探测闪烁性能研究
Scintillation Properties of Cs2LiYCl6∶Ce Crystal for Neutron and Gamma Dual Detection
闪烁晶体 中子/伽马甄别 中子辐射探测 坩埚下降法 脉冲波形甄别 能量分辨率 scintillation crystal Cs2LiYCl6∶Ce Cs2LiYCl6∶Ce n/γ discrimination neutron radiation detection Bridgman method pulse shape discrimination energy resolution
摘要
Cs2LiYCl6∶Ce(CLYC)晶体是一种具有n/γ双探测能力的新型闪烁晶体。采用坩埚垂直下降法生长出富6Li的CLYC晶体毛坯, 经加工、封装得到50 mm×50 mm的CLYC闪烁晶体封装件, 其对137Cs 662 keV γ射线的能量分辨率为4.22%; 测量252Cf中子源的脉冲波形甄别(PSD)品质因子(FOM)为3.45。凭借其优异的性能, CLYC闪烁晶体有望在中子探测领域替代3He正比计数管, 并可作为n/γ双探测的优选材料, 应用于中子辐射探测器、放射性同位素识别仪、个人辐射剂量仪, 以及其他中子、伽马射线的探测。
Abstract
Cs2LiYCl6∶Ce(CLYC) is a novel scintillation crystal with the capability of neutron and gamma-ray detection. It can be used in the field of neutron and gamma-ray detection. The CLYC scintillation crystal with 95% enrichment of 6Li was grown by the vertical Bridgman method. After processing and moisture-proof packaging, a housed sample of 50 mm×50 mm CLYC scintillation crystal was obtained. 4.22% energy resolution is measured at 662 keV of 137Cs gamma rays. Neutron-gamma discrimination is also achieved. The figure of merit (FOM) of pulse shape discrimination (PSD) measured with a 252Cf neutron source is 3.45. With its excellent performance, CLYC scintillation crystal is expected to replacement for Helium-3 gas in the field of neutron detection, and can be used as the preferred material for n/γ dual detection. So CLYC crystal can be used in neutron radiation detectors, radioisotope identification instruments, personal radiation dosimeters, and other neutrons-gamma detection.
侯越云, 桂强, 张春生, 杨蕾, 袁辉平, 刘珊, 任国浩, 张明荣. Cs2LiYCl6∶Ce晶体的n/γ双探测闪烁性能研究[J]. 人工晶体学报, 2021, 50(10): 1933. HOU Yueyun, GUI Qiang, ZHANG Chunsheng, YANG Lei, YUAN Huiping, LIU Shan, REN Guohao, ZHANG Mingrong. Scintillation Properties of Cs2LiYCl6∶Ce Crystal for Neutron and Gamma Dual Detection[J]. Journal of Synthetic Crystals, 2021, 50(10): 1933.