能量色散型X荧光分析仪光管、样品、探测器距离的蒙特卡罗优化  

Optimization of the Distance Among the Detector,Tube and Samples in the EDXRF Analyzer by the Monte Carlo Method

作　　者：刘艳芳[1] 赖万昌[1] 谢希成[1] 张江云[2] 周良平[1] 

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059 [2]四川大学原子核科学技术研究所,四川成都610064

出　　处：《核电子学与探测技术》2011年第9期1038-1041,1061,共5页Nuclear Electronics & Detection Technology

基　　金：国家863计划课题(2006AA09Z219)

摘　　要：在EDXRF分析中,X射线荧光计数率与待测元素有密切关系。由理论可知,在能量色散型X荧光分析仪设计时,优化X光管、样品和探测器的相对几何位置对荧光计数率的改善有很大的帮助。在前期模拟的最佳角度基础上,采用MCNP程序,建立几何模型,模拟了X光管、样品和探测器之间不同距离时的X荧光计数率,得到了这三者之间的最佳距离。X-ray fluorescence count rate have closed relationship with analyze when EDXRF analysis.We know from the theory,the optimization of X-ray tube,sample and detector geometry on the relative improvement in fluorescent count rate which is very helpful when the energy dispersive X-ray fluorescence analyzer design.Pre-simulation based on the best angle,we use of MCNP program to obtain the X fluorescence count rate from building the geometry model to simulate among the X-ray tube,sample and detector at different distances.We get the best distance between the three.

关 键 词：EDXRF 计数率 最佳距离 

分 类 号：TL8[核科学技术—核技术及应用] TG115.22[金属学及工艺—物理冶金]