Monte Carlo模拟方法在^(133)Xe活度绝对测量中的应用  

Application of Monte Carlo Simulation to ^(133)Xe Activity Measurement

作　　者：解峰[1] 李雪松[1] 师全林[1] 代义华[1] 何小兵[1] 余功硕[1] 姜文刚[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《现代应用物理》2017年第4期16-21,共6页Modern Applied Physics

摘　　要：为提高符合效率外推法测量^(133) Xe活度的准确度,提出一种基于Geant4软件包的蒙特卡罗理论模拟方法,通过理论预测^(133) Xe活度测量的效率外推曲线和活度,确定了最佳的测量条件和数据拟合函数。使用4πβ(PS)-4πγ(NaI)符合测量系统,绝对测量了^(133) Xe活度,并与利用HPGeγ谱仪的测量结果进行了比较,验证了MC模拟方法预测的可靠性。In order to improve measurement accuracy of ^(133)Xe activity by the coincidence efficiency extrapolation technique,A Monte Carlo simulation method based on Geant4 software is proposed.By predicting the efficiency extrapolation curve and activity of ^(133)Xe,the optimal measurement conditions and data fitting function are determined.The activity of ^(133)Xe is determined absolutely by 4πβ(PS)-4πγ(NaI)coincidence measurement system,and is compared with the measurement results obtained by using HPGeγspectrometry system.The experiment data show that the results predicted by Monte Carlo simulation are reliable.

关 键 词：符合效率外推法 ^133Xe GEANT4 蒙特卡罗方法 4πβ(PS)-4πγ(NaI) 高纯锗 

分 类 号：P631[天文地球—地质矿产勘探]