Perturbative calculations of selective adsorption intensity features

Publisher Website
Google Scholar
Abstract
An expansion method similar to Feshbach's theory of nuclear resonances is developed to treat atom-surface scattering in the selective adsorption region. Intensity feature corresponding to resonances are clearly displayed in the formalism. Low-order results are used to correlate shapes of isolated resonances with the important Fourier components of the potential. Inelasticity is included via an optical potential, and its effect on rule-2 resonances in the He-graphite (0001) system is discussed. Intensities calculated with this method for the He-graphite system compare well with the exact close-coupling results. Calculations indicate that this method may be used to treat systems with corrugations greater than found in the He-graphite system, but that the corrugations in the He-LiF system are too large to allow a perturbation expansion.