BeCl2分子的低能电子弹性散射研究  

Low-energy electron elastic scattering study of BeCl2 molecule

作　　者：李雪 王怡文 张浩兴 王克栋[1] LI Xue;WANG Yi-Wen;ZHANG Hao-Xing;WANG Ke-Dong(School of Physics,Henan Normal University,Xinxiang 453007,China)

机构地区：[1]河南师范大学物理学院,新乡453007

出　　处：《原子与分子物理学报》2020年第1期81-88,共8页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(U1504109,11604085);河南省高校科技创新人才项目(19HASTIT018);河南省科技攻关项目(182102310775)。

摘　　要：基于R矩阵理论方法,通过构建BeCl2分子的静态交换势模型(SE),静态交换加极化势模型(SEP)和密耦合模型(CC),在0-10eV能量范围内首次研究了低能电子与BeCl2分子的散射动力学过程,预测了弹性散射积分截面,并在三种模型中分别发现一个来自B2u和B3u对称性贡献的势形共振态.讨论了这些共振态随着极化效应的变化,获得了收敛的截面和共振态结果.进一步使用POLYDCS程序首次计算了电子与BeCl2分子的散射微分截面(DCS)以及动量转移截面(MTCS).当前研究结果将为天体物理和等离子体物理提供重要的截面数据.In this paper,Ab initio scattering calculations for low-energy electron collisions with BeCl2 molecule have been carried out.The calculations were performed with R-matrix method in the static exchange(SE),static exchange plus polarization(SEP)and close coupling(CC)models for electron energies ranging from 0 to 10 eV.We found one shape resonance state with B2u symmetry and the other one with B3u symmetry in each electron scattering model.We discuss the changes of these resonance states with the polarization effect,and obtain the convergence cross section and resonance state results.The differential scattering cross section(DCS)and momentum transfer cross section(MTCS)of electrons collision with BeCl2 molecule were first calculated by using the POLYDCS program.Current research results will provide important cross-sectional data for astrophysics and plasma physics.

关 键 词：势形共振态 弹性散射截面 微分散射截面 R-矩阵 

分 类 号：O561.5[理学—原子与分子物理]