自适应截断方法在光子电子能量沉积计算中的应用

在光子与电子沉积能的数值计算中,电子截断能的高低显著地影响计算效率与精度.关于电子截断能的选取,目前没有统一的标准.给出一种根据网格尺度、网格材料与电子位置自适应确定电子截断能的方法.自适应截断方法以电子在网格中的剩余总行程小于其到网格界面的最短距离作为截断条件.同MCNP程序自带的CUT方式相比,自适应方法的计算精度与效率更高.最重要的是,对任意能量、网格尺寸的模型,自适应方法均可胜任,完全无需人为判断.

Self-adaptive Method for Energy Deposition of Photons and Electrons

A method is proposed for choosing electron cutoff energy,which is self-adaptive with cell size,background material and electron position.As residuary range of an electron defined by total stopping power is less than distance to the nearest cell boundary,the electron is killed.Compared with the CUT model used in MCNP program,efficiency and precision of self-adaptation method is higher.The most important is that cutoff energy of electron is selected automatically in program in all models,without consideration...