Method of molecular pseudobeams for investigation of gas-solid surface interactions with angstrom spatial distribution

The aim of the paper is to justify that the local (with angstrom resolution) dynamics of collisions of epithermal particles with a solid surface can be examined in experiments with grazing scattering of fast atoms of inert gases on physically adsorbed monolayers. The latter acts as point sources of studied particles that start at the directions closed to normal from well-defined positions. The method of investigation is based on the kinematic and dynamic peculiarities of grazing collisions of fast atoms with an ordered system of scattering centers on a solid surface. The variations of energy and angle characteristics of fast beams provide the purposeful change in the momentum distribution of particles knocked out of monolayers. This fact offers unique possibilities of studying the dynamics of gas-surface elementary processes at high spatial resolution