An Empirical Formula Approach to Total Cross Sections for Electron Scattering on Polyatomic Molecules  

作　　者：杜朝玲 孙金锋 刘玉芳 程光煦 陈延峰 

机构地区：[1]Department of Physic and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 [2]Department of Phvsics, Henan Normal University, Xinxiang 453002 [3]Department of Materials Science and Engineering, and National Laboratory of Solid State Microstructures,Nanjing University, Nanjing 210093

出　　处：《Chinese Physics Letters》2005年第11期2801-2804,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10174019, and the National Basic Research Programme of China under Grant No 001CB610404.

摘　　要：Considering the real experimental process of e-molecule scattering a new empirical formula has been developed to calculate the total cross sections （TOSs） for electron scattering on polyatomic molecules （CH4, C2H2, CH3OH and CH3F）. The present results are compared with other available theoretical results and experimental data. The new formula incorporates an energy factor f（E） to represent the elastic and inelastic changing process during experiments. It depends on no adjustable parameters and has also extended the validity of the empirical approaches to lower energy range further.Considering the real experimental process of e-molecule scattering a new empirical formula has been developed to calculate the total cross sections （TOSs） for electron scattering on polyatomic molecules （CH4, C2H2, CH3OH and CH3F）. The present results are compared with other available theoretical results and experimental data. The new formula incorporates an energy factor f（E） to represent the elastic and inelastic changing process during experiments. It depends on no adjustable parameters and has also extended the validity of the empirical approaches to lower energy range further.

关 键 词：HYDROCARBON MOLECULES INTERMEDIATE ENERGIES ADDITIVITY RULE CO C2H2 N-2 COLLISIONS POSITRONS 

分 类 号：O561.5[理学—原子与分子物理]