Cs_(2)LiYCl_(6)∶Ce晶体的n/γ双探测闪烁性能研究

Scintillation Properties of Cs_(2)LiYCl_(6)∶Ce Crystal for Neutron and Gamma Dual Detection

Cs_(2)LiYCl_(6)∶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^(6)Li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^(137)Cs 662 keVγ射线的能量分辨率为4.22%;测量^(252)Cf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。

Cs_(2)LiYCl_(6)∶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 ^(6)Li 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 ^(137)Cs gamma rays.Neutron-gamma discrimination is also achieved.The figure of merit(FOM)of pulse shape discrimination(PSD)measured with a ^(252)Cf 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/γdual detection.So CLYC crystal can be used in neutron radiation detectors,radioisotope identification instruments,personal radiation dosimeters,and other neutrons-gamma detection.