Abstract
Helium atom scattering is a powerful technique to study surface lattice dynamics [1]. Although highly monochromatized atomic beam and energy analysis of the scattered intensity can. be necessary to yield precise measurement of the surface phonon dispersion relation, in special cases useful and sufficiently detailed information on lattice dynamics can be obtained through the study of only the inelastic bound state resonance angular behaviour (inelastic selective adsorption). The selective adsorption process was extensively studied in recent years as one of the most relevant phenomena in the diffraction of atoms from surfaces. The present paper will be devoted to illustrating the selective adsorption mechanism in the inelastic scattering, a process that was studied in detail for He/graphite. The results of this study were manyfold; several different ways of forming a bound state have been observed and a general theory for resonant inelastic scattering was proposed [2] to explain the experimental data.
Published Version
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