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 recently derived simple: analytical formula. The repulsive potential is based 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 properties of the free constituent atoms. The calculated curves agree well with both experimental and ab initio theoretical data.