Second order classical perturbation theory for atom surface scattering: Analysis of asymmetry in the angular distribution

Eli Pollak, Salvador Miret-Artés
2014 Journal of Chemical Physics  
Energy and momentum transfer of He atoms scattered from a lithium fluoride crystal surface A second order classical perturbation theory is developed and applied to elastic atom corrugated surface scattering. The resulting theory accounts for experimentally observed asymmetry in the final angular distributions. These include qualitative features, such as reduction of the asymmetry in the intensity of the rainbow peaks with increased incidence energy as well as the asymmetry in the location of
more » ... the location of the rainbow peaks with respect to the specular scattering angle. The theory is especially applicable to "soft" corrugated potentials. Expressions for the angular distribution are derived for the exponential repulsive and Morse potential models. The theory is implemented numerically to a simplified model of the scattering of an Ar atom from a LiF (100) surface. © 2014 AIP Publishing LLC. [http://dx.
doi:10.1063/1.4851835 pmid:24437904 fatcat:ob2qjqtlkbd3zdw3d47ol2tdl4