Small angle ion scattering by the structures on single crystal surface corresponding to initial stages of adsorption

A computer simulation method has been used to study small angle correlated scattering of low energy ions by the single crystal surface with submonolayer adsorption coverages. It has been shown that a rainbow effect and a chain effect at multiple scattering on adsorbate and substrate atoms and inverse ratio of masses of colliding particles lead to the appearance of additional peaks in angular and energy distributions. An analysis of these peaks and of the dynamics of their alteration upon adsorption as compared with experiment makes it possible to control the initial stages of adsorption and to identity adsorption structures by means of small angle ion-scattering spectroscopy