Cs_(2)LiYCl_(6):Ce探测器n-γ甄别及γ解谱方法  

Neutron-Gamma Discrimination and Gamma Spectrum Analysis Method of Cs_(2)LiYCl_(6):Ce Detector

作　　者：苏丹 张时宇 SU Dan;ZHANG Shiyu(Department of Radiochemistry,China Institute of Atomic Energy,Beijing 102413,China;School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413 [2]兰州大学核科学与技术学院,兰州730000

出　　处：《现代应用物理》2024年第2期34-41,共8页Modern Applied Physics

摘　　要：Cs_(2)LiYCl_(6):Ce(CLYC)晶体因其优异的线性响应、高光产额和较强的n-γ甄别能力,在瞬发γ射线中子活化分析技术(prompt gamma neutron activation analysis,PGNAA)中表现出极高的应用潜力。该技术可以用于元素无损分析、工业物料分析、环境监测及安全等诸多领域。本文针对CLYC探测器进行测试,旨在探究其在PGNAA领域的应用前景。通过Pu-C中子源和多种γ源(^(22)Na,^(60)Co,^(137)Cs,^(152)Eu)的实验测量对该探测器的性能进行测试。同时,开发了一套基于Gravel算法的γ解谱程序,以优化γ能谱分析。实验结果验证了CLYC探测器在n-γ混合场环境下的出色甄别能力,能有效剔除中子的干扰。γ能谱的解谱结果可以精确的反应入射γ能量信息,算法的平均相对偏差均小于1。通过多线性源解谱结果的可靠性确保了在复杂的伽马场环境中对伽马射线的精确识别和分析能力。Cs_(2)LiYCl_(6):Ce(CLYC)crystals have excellent linear response,high light yield and strong neutron-Gamma discrimination capability.Therefore,CLYC detectors have board development prospects in the fields of neutron physics and neutron application technology.The Prompt gamma neutron activation analysis(PGNAA)with the performance of high-precision and multi-element,which can be widely used in non-destructive testing fields such as industry,environment,and safety.In this research,the CLYC detector can be used in was tested to explore its application prospect in the field of PGNAA.The purpose of CLYC research is explore its application prospect in field of PGNAA.In addition,a gamma analysis program based on Gravel algorithm was developed,and a method of computing the number of iterations based on Mean Relative Error was proposed.They can be used inγenergy spectrum analysis.Also,experimental measurements of neutron sources(Pu-C)and gamma sources(^(22)Na,^(60)Co,^(137)Cs,^(152)Eu)were carried out.The results showed that the n-γdiscrimination ability of CLYC detector was excellent detector,which can eliminate the influence of neutrons effectively in the neutron gamma mixed field.And the program ofγdeconvolution still could compute accurately in the complexγ-field environment.

关 键 词：CLYC探测器 n-γ甄别 能谱反演 PGNAA 

分 类 号：TL81[核科学技术—核技术及应用] O571[理学—粒子物理与原子核物理]