论文标题
按照瞬时过渡速率进行平流 - （110）钻石平面的855 MEV电子的计算机模拟
De-channeling in terms of instantaneous transition rates -- Computer simulations for 855 MeV electrons at (110) planes of diamond
论文作者
论文摘要
已经对钻石单晶（110）平面的855 MeV电子进行了蒙特卡罗模拟计算。使用了连续图的图片。在筛选原子上散射电子的横向电势和角度分布都是基于Doyle-Turner散射因子，这些因子被莫利表示对大动量转移的功能依赖性外推。考虑到纵向和横向激发，已经得出了从双差分横截面，能量和动量转移的功能，从双差分横截面中得出了小于30 keV的能量的散射横截面。对于高于30的能量，使用Møller横截面。经典描述了连续横向电势中粒子的动力学。通道过程的结果以瞬时过渡速率作为穿透深度的函数表示，表明只有在大约15美元$ $ m后达到平衡阶段才能达到平衡阶段后，才能通过单个指数函数描述通道。作为副产品，已经得出了进入Fokker-Planck方程的漂移和扩散系数的改善，可以通过这些方程提高其预测能力。
Monte-Carlo simulation calculation have been performed for 855 MeV electrons channeling in (110) planes of a diamond single crystal. The continuum potential picture has been utilized. Both, the transverse potential and the angular distributions of the scattered electrons at screened atoms are based on the Doyle-Turner scattering factors which were extrapolated with the functional dependence of the Molière representation to large momentum transfers. Scattering cross-sections at bound electrons have been derived for energies less than 30 keV from the double differential cross-section as function of both, energy and momentum transfer, taking into account also longitudinal and transverse excitations. For energies above 30 keV the Møller cross-section is used. The dynamics of the particle in the continuum transverse potential has been described classically. Results of the channeling process are presented in terms of instantaneous transition rates as function of the penetration depth, indicating that channeling can be described by a single exponential function only after the equilibration phase has been reached after about 15 $μ$m. As a byproduct, improved drift and diffusion coefficients entering the Fokker-Planck equation have been derived with which its predictive power can be improved.
