一个改进的Love电子能量损失方程

应用科学学报 ›› 2000, Vol. 18 ›› Issue (4): 331-334.

一个改进的Love电子能量损失方程

谭震宇¹, 何延才²

1. 山东工业大学电力学院, 山东济南 250061;
2. 中国科学院上海硅酸盐研究所, 上海 200050

收稿日期:1999-06-25 修回日期:2000-03-15 出版日期:2000-12-31 发布日期:2000-12-31
作者简介:谭震宇(1957-),男,贵州黔西人,教授,硕士.
基金资助:
国家自然科学基金资助项目(59471068);山东省高校中青年学科带头人基金资助项目(鲁教科199431)

An Improved Love Equation of Electron Energy Loss

TAN Zhen-yu¹, HE Yan-cai²

1. School of Electric Power, Shandong University of Technology, Jinan 250061, China;
2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received:1999-06-25 Revised:2000-03-15 Online:2000-12-31 Published:2000-12-31

摘要/Abstract

摘要： 给出一个改进的Love电子能量损失方程——ML方程,该方程既保持了Love方程可积分得到Bethe路径解析式特点,能量较低时又能较好地描述电子能量损失.用ML及Love方程对Al、Ag、Au的电子阻止本领与电子作用区作了计算比较.基于Mott截面以及ML与Love方程,用Monte Carlo方法模拟了E≤5keV的低能电子在Al、Ag、Au中的散射,计算的电子背散射系数表明,改进后的ML方程计算结果与实验符合较好。

关键词: Monte Carlo方法, 阻止本领, 低能电子散射

Abstract: An improved Love equation (ML equation) of electron energy loss is presented. It not only retains love equation's analytical characteristic of deriving Bethe path by integration, but can also better describe the energy loss of electron in low energy region. With ML equation, the stopping power and range for electron in Al, Ag, An are calculated and compared with those from Love equation. By using Monte Carlo method and based on Mott cross section for elastic scattering of electron and ML or Love equation for energy loss of electron respectively, the scattering process of low energy electrons with energy E ≤ 5keV in solids is simulated. The calculated electron backscattering coefficients shows that the calculated results based on the ML equation are in agreement with experiments.

Key words: stopping power, low energy electron scattering, Monte Carlo method

中图分类号:

O562.5

谭震宇, 何延才. 一个改进的Love电子能量损失方程[J]. 应用科学学报, 2000, 18(4): 331-334.

TAN Zhen-yu, HE Yan-cai. An Improved Love Equation of Electron Energy Loss[J]. Journal of Applied Sciences, 2000, 18(4): 331-334.