Abstract
An analytical surface model that alters the tangential velocity component by a periodic, time-dependent force and reflects the normal velocity component specularly is presented. Single and double lobe distributions with and without reverse scattering are obtained. The variation of the peak locations with changes in gas temperature, mass of the gas molecule, and incident angle agrees qualitatively with experimental data for the scattering of thermal energy, rare gas beams from the <010> azimuth of LiF. The variation of the relative peak intensities with changes in gas temperature agrees qualitatively with the experimental data but the variation of relative peak intensities is more sensitive to changes in mass of the gas molecule and the incident angle than the experimental data. The theoretical lobes are narrower and more pronounced than those observed experimentally.
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