MC法模拟光子在介质中多次散射规律

摘要

The authors simulate the collision of photons in samples by MCNP5.According to the simulation data, the ratio of photon amount which has n times collision to NPS is calculated, and then study the law that the collision of photons in medium.Comparing the calculated cross section based on the simulation data with cross section in document, the results show that MCNP5 program can simulate the physical process of photons transportation accurately.The simulative data have a positive impact on the study of the scattering effect on the fluorescence intensity.%运用MCNP5软件模拟了光子在介质中发生碰撞的过程.针对所选择的不同介质及不同光子能量分别模拟计算出发生n次碰撞的光子在NPS中的比例,研究光子在介质中多次散射规律.将模拟计算出的截面和文献中的截面数据进行对比,结果表明MCNP5程序能准确处理光子在介质中的输运问题,模拟数据能为研究散射效应对荧光强度的影响提供一定的条件.