Van der Waals Forces in Atoms and Molecules

摘要: The time‐dependent variation‐perturbation method is applied to the estimation of van der Waals forces (—C/R6 term) in atoms and molecules. Use made an expression for coefficient C involving integral over imaginary frequencies dynamic polarizabilities interacting species. With analytic approximation that can be extended into frequency range, a simple formula force obtained. Applications interactions between S‐state (H, He, Ne, Ar) are given results compared with available theoretical experimental values. Also, atom—molecule H2) (He, examined, anisotropies calculated.