Pairwise additive potential models for the interaction of He atoms with the (001) surfaces of LiF, NaF, NaCl and LiCl

Abstract

Based on effective pair potentials for HeLi +, HeF −, HeNa +, and HeCl − the interactions of He atoms with the (001) surfaces of LiF, NaF, NaCl, and LiCl are calculated. The semi ab initio model of Celli et al. as introduced for He-LiF(001) [J. Chem. Phys. 83 (1985) 2504] is shown to give a reasonable description also of the HeNaF(001) system. Furthermore a simplified version of the pairwise additive model recently introduced by Fowler and Hutson [Phys. Rev. B33 (1986) 3724] is used to predict the He atom-surface potentials of all four systems named above.