On the direct inclusion of polarization into an electron gas model for closed shell atom–ion interactions
Abstract
A general extension of the Gordon and Kim method has been made which allows polarized atomic charge densities to be used. Comparisons with ab initio studies for He + Li+ and He + Na+ show that good agreement can be obtained without any empirical modification of the polarization energy but that an exchange correction is necessary in the He + Li+ system. Results for He + Li+, He + Na+ and He + F– are compared with the modified Drude model and show smaller differences than might be expected.