Cs2LiYCl6∶Ce晶体的n/γ双探测闪烁性能研究

摘要/Abstract

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φ50 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。

关键词: 闪烁晶体, Cs₂LiYCl₆∶Ce, 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

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 φ50 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.

Key words: scintillation crystal, Cs₂LiYCl₆:Ce, n/γ discrimination, neutron radiation detection, Bridgman method, pulse shape discrimination, energy resolution

中图分类号:

O782

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): 1933-1939.

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): 1933-1939.

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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

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