基于严格交换势的低能电子与H2分子碰撞振动激发散射截面的研究  

Study on vibrational excitation cross sections of low-energy electrons scattering from H_2 molecule including exact exchange

作　　者：李勇军[1] 冯灏[2] 孙卫国[1,2] 曾阳阳[1] 王小炼[1] 李会东[1] 樊群超[2] 

机构地区：[1]四川大学原子与分子物理研究所,成都610065 [2]西华大学物理与化学学院,先进计算研究中心,成都610039

出　　处：《物理学报》2011年第4期178-185,共8页Acta Physica Sinica

基　　金：四川省科技厅应用基础基金(批准号:2009JY0140)资助的课题~~

摘　　要：严格交换势用于研究低能电子与H2分子的弹性和非弹性散射截面,线性代数方法和R-矩阵传播子相结合求解基于振动密耦合方法的积分-微分耦合方程组,由此得到收敛的(0→0,0→1,0→2)散射微分截面和积分截面.理论计算结果与目前优秀的实验值和其他理论计算值进行了比较,表明基于振动密耦合方程的严格交换势在低能电子与H2分子振动激发散射中有重要作用.Elastic and inelastic differential and integral cross sections for low-energy vibrational excitation of H2 by electron impact are studied with exact exchange.The resulting coupled integrodifferential equations are solved using a combination of linear-algebraic and R-matrix-propagator techniques.The converged（0 → 0,0 → 1,0 → 2） differential and integral cross sections are obtained.The calculated results are in good agreement with experimental resalts and other calculations,showing that the exact exchange based on equations of vibrational close coupling plays an important role in low-energy electron scattering from H2 molecule.

关 键 词：严格交换势 H2分子振动激发 微分截面 积分截面 

分 类 号：O561.5[理学—原子与分子物理]