蒙特卡罗效率传递因子在溴化镧探测器无源效率刻度中的应用  

Application of Monte Carlo Efficiency Transfer Method to the Efficiency Virtual Calibration of LaBr_3 Detector

作　　者：曹勤剑[1,2] 刘立业[1] 夏三强 金成赫[1] 熊万春[1] 肖运实[1] 赵原[1] 卫晓峰[1] CAO Qin-jian LIU Li-ye XIA San-qiang JIN Cheng-he XIONG Wan-chun XIAO Yun-shi ZHAO Yuan WEI Xiao-feng(China Institute for Atomic Energy, Beijing 102413 China China Institute for Radiation Protection.)

机构地区：[1]中国原子能科学研究院,北京102413 [2]中国辐射防护研究院

出　　处：《中国辐射卫生》2017年第2期145-149,共5页Chinese Journal of Radiological Health

基　　金：国家自然科学基金资助项目(11275174)

摘　　要：目的将蒙特卡罗效率传递因子应用到溴化镧探测器的无源效率刻度中。方法本文将蒙特卡罗效率传递因子应用到溴化镧探测器的全能峰无源效率刻度中,并基于溴化镧探测器的点源效率实验计算出该探头在121.8~1332.5 keV能量范围内的效率传递因子。在此基础上,将基于蒙特卡罗效率传递因子的效率计算值与实验值进行了比较。结果实验结果表明:在121.8~1332.5 keV能量范围内,全能峰效率计算值与效率测量值的偏差在±5%以内。结论蒙特卡罗效率传递方法进一步提高了辐射探测器无源效率刻度方法的适用性。Objective The method of Monte Carlo efficiency transfer was applied to determine full energy peak efficiency of the LaBr3 detector.Methods The method of Monte Carlo efficiency transfer was introduced,and the efficiency transfer factors of the LaBr3 detector were calculated based on the point-source experiments.At last,the results of calculated full energy peak efficiency were compared with the measured values.Results The comparisons between calculations and point source ex periments showed that the relative deviations were mostly within± 5% in the energy range of 121.8 ～ 1332.5 keV.Conclusion The results showed that the mothed of virtual calibration was more feasible with Monte Carlo efficiency transfer.

关 键 词：效率传递因子 蒙特卡罗 效率刻度 溴化镧探测器 

分 类 号：TL812[核科学技术—核技术及应用]