利用WBEPM模型和稳定变分法计算氦原子的极化率和色散系数

以最弱受约束电子势模型(WBEPM)理论为基础,建立了计算氦原子多极动态极化率和相互作用色散系数的稳定变分方法 .导出了该方法中所涉及的矩阵元和线性方程组的解析表达式.作为应用,具体计算了基态氦原子的极化率和两体色散系数,将计算结果与用其他方法所得到的结果进行了比较,数据基本一致.

Calculation of multipole polarizability and dispersion coefficients for Helium by WBEPM and variationally stable procedure

Based on the weakest bound electron potential model (WBEPM) theory, method of calculating the multipole dynamic polarizability and dispersion coefficients for Helium by a variationally stable procedure is established. The matrix elements and a group of linear equations, involving in this approach, are derived analytically. As an application, the polarizability and two-body dispersion coefficients between Helium atoms in their ground states are calculated concretely and are compared with those calculated previously by other procedures. It is found that the calculated results are consistent with those of others.