Charge exchange and hybridization in ion-surface interactions

Level shifts and widths for hydrogenic states (nlm) interacting with a metal surface have been calculated perturbatively for large n(n=1...20) and different model perturbation potentials. The shifts approximately scale with the ion-surface distance in units of the classical orbital radius, r{sub n}, of the hydrogenic manifold. As special cases previous results were confirmed. Based on the perturbative results, self energy matrices including various n-manifolds were obtained which allowed for the calculation of diabatic and adiabatic non-perturbative level shifts and widths, and hybrid orbitals. A new close-coupling calculation is being developed around these matrix elements, that will be applied to the interaction of ions in various charge states with metal surfaces.