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

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.