Interaction potentials for modeling of ion-surface scattering

Accurate potential data for system Ar+, С+, Cd+, Kr+, Ne+, Xe+, Zn+–Xe, Ar+–Ar and Ne+–Ne were obtained by analyzing the scattering cross-sections. These data extend the existing database of potentials obtained experimentally. To fit better the existing data, a new analytical form of the potential is proposed. The fitting errors analysis shows that the universal potential can be used only for the systems with nuclear charges Z > 18 and in the region where the distances of closest approach are less than R < 8 af (here af is the Firsov screening length (see below)). The model of individual potentials is suggested, which extends the region of potential application and minimizes the fitting errors.