Classical Model for Gas–Surface Interaction

Abstract

A three-dimensional classical theoretical model for the interaction of a monatomic gas impinging as a monoenergetic atomic beam on its own solid phase has been formulated and tested using the experimental data for the gaseous argon–solid argon system. The theoretical interaction is modelled as the collision of hard spheres with the inclusion of an attractive surface field energy, the only adjustable parameter in the model, and surface temperature. The theoretical results from this exceedingly simple model exhibit nearly every characteristic of the available experimental data for argon.