Polarization effect in(e,2e) reaction process for Ar(3s) in coplanar asymmetric geometry  

作　　者：周丽霞 王殿生 燕友果 王彩玲 

机构地区：[1]College of Science, China University of Petroleum

出　　处：《Chinese Physics B》2014年第11期268-272,共5页中国物理B（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities of China(Grant Nos.13CX02019A and 13CX05017A)

摘　　要：The （e, 2e） triple differential cross sections （TDCSs） of Ar （3s） are calculated by using distorted-wave Born approx- imation under coplanar asymmetric geometry. The incident electron energy is 113.5 eV, and the scattering electron angle 01 is -15~. The ejected electron energy is set at 10 eV, 7.5 eV, 5 eV, and 2 eV, respectively. The polarization effects have been discussed and the polarization potential Vpol changing from a second-order to a fourth-order term has been analyzed. Our calculated TDCSs have been compared with reported experimental and theoretical results, and the calculated TDCSs of polarization potential up to the fourth order could give a good fit with experimental results in the binary region, but fail to predict the correct recoil-to-binary ratio in most cases.The （e, 2e） triple differential cross sections （TDCSs） of Ar （3s） are calculated by using distorted-wave Born approx- imation under coplanar asymmetric geometry. The incident electron energy is 113.5 eV, and the scattering electron angle 01 is -15~. The ejected electron energy is set at 10 eV, 7.5 eV, 5 eV, and 2 eV, respectively. The polarization effects have been discussed and the polarization potential Vpol changing from a second-order to a fourth-order term has been analyzed. Our calculated TDCSs have been compared with reported experimental and theoretical results, and the calculated TDCSs of polarization potential up to the fourth order could give a good fit with experimental results in the binary region, but fail to predict the correct recoil-to-binary ratio in most cases.

关 键 词：（e 2e） reaction distorted-wave Born approximation triple differential cross sections polarizationeffect 

分 类 号：O561.5[理学—原子与分子物理]