POTENTIALS FOR SOME RARE-GAS AND ALKALI-HELIUM SYSTEMS CALCULATED FROM THE SURFACE INTEGRAL METHOD

The van der Waals potential curves of H-2((3) Sigma), He-2, Ne-2, HeNe , HHe, LiHe, NaHe, KHe, RbHe and CsHe have been calculated using a rec ently derived simple: analytical formula. The repulsive potential is b ased on exchange energies calculated from the surface integral method applied to multielectron systems. With the exception of the long-range dispersion coefficients, all the input parameters are atomic properti es of the free constituent atoms. The calculated curves agree well wit h both experimental and ab initio theoretical data.