Electron-Helium Atom Collisions in the Presence of a Bichromatic Laser Field  

作　　者：ZHU Zun-Lue LIANG Ming-Chao SUN Jin-Feng 

机构地区：[1]College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, China [2]Department of Physics, Luoyang Normal College, Luoyang 471022, China

出　　处：《Communications in Theoretical Physics》2008年第8期477-480,共4页理论物理通讯（英文版）

基　　金：supported by National Natural Science Foundation of China under Grant No.10574039;the Science Foundation for Young Scientists of Henan Normal University under Grant No.2005004

摘　　要：The differential cross section （DCS） for electron-helium atom collisions in the presence of a bichromatic CO2 laser field is investigated as a function of the scattering angle θ by employing first-Born approximation （FBA） with a simple screening electric potential. We discuss in detail the influence of the scattering geometry, the photon energy and the number of photons exchanged on the DCSs. These illustrate that the three factors have important effects on the elastic scattering and the screening electric potential is effective.

关 键 词：differential cross section bichromatic laser field first Born approximation scattering geometry 

分 类 号：O57[理学—粒子物理与原子核物理]