MC法模拟宽能型HPGeγ谱仪全能峰效率  

Simulation of Full-energy Peak Efficiency of Bulk Samples for a Broad-energy HPGe Detector by Monte Carlo Method

作　　者：张磊 罗丽娟 李晓凤 ZHANG Lei;LUO Li-juan;LI Xiao-feng(Shanghai Radiation Environmental Safety Technology Center,Shanghai 200065,China)

机构地区：[1]上海市辐射环境安全技术中心,上海200065

出　　处：《核电子学与探测技术》2021年第5期800-803,共4页Nuclear Electronics & Detection Technology

基　　金：上海市生态环境局青年科研项目(2021-013)资助。

摘　　要：采用MCNP法对宽能型HPGeγ谱仪的全能峰效率进行了模拟计算。以固体(SiO_(2))体源作为参考源,获得宽能型探测器晶体结构的优化参数。宽能型探测器直径和高度的变化对全能峰效率的影响程度与N型和P型探测器存在一定差别。液体体源和生物体源模拟全能峰效率与实验结果吻合得较好,偏差均在±6%以内;气溶胶滤膜体源和活性炭滤盒体源,低能全能峰效率最大偏差不超过9%。环境体源验证结果表明:宽能型探测器晶体优化参数的准确性和可靠性。MCNP method was used to simulate the full-energy peak efficiency of a Broad-energy HPGe detector.The optimal crystal structure parameters of the detector were obtained by using solid source as reference source.The effect of the diameter and height of the Broad-energy Germanium detector on the full-energy peak efficiency is different from that of the N-type and P-type detectors.The full-energy peak efficiency of simulation of liquid source and biological source was in good agreement with the experimental efficiency,and the deviation was less than 6%.Aerosol filter source and activated carbon cartridge source,the maximum deviation of the low energy full-energy peak efficiency was no more than 9%.The results of validation of environmental volume sources showed that,the accuracy and reliability of the crystal optimization parameters.

关 键 词：宽能型HPGeγ谱仪 MCNP 全能峰效率 晶体优化 

分 类 号：TL81[核科学技术—核技术及应用]