The inelastic He/Ag(111) cross section has been evaluated in the one-phonon distorted-wave Born approximation. The authors use an atom-surface potential made up by a repulsive part derived from a superposition of atomic charges and by the attractive van der Waals interaction. The surface phonon density of states is evaluated within a force-constants parametrization of the bulk dynamics. By changing the surface force constants the authors are able to explain all the salient features appearing in the experimental time-of-flight spectra.
Explanation of the anomalous peak observed in the He/Ag(111) atom scattering / Bortolani, Virginio; Franchini, Anna; Nizzoli, F.; Santoro, Giorgio. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 52:(1984), pp. 429-432. [10.1103/PhysRevLett.52.429]
Explanation of the anomalous peak observed in the He/Ag(111) atom scattering
BORTOLANI, Virginio;FRANCHINI, Anna;SANTORO, Giorgio
1984
Abstract
The inelastic He/Ag(111) cross section has been evaluated in the one-phonon distorted-wave Born approximation. The authors use an atom-surface potential made up by a repulsive part derived from a superposition of atomic charges and by the attractive van der Waals interaction. The surface phonon density of states is evaluated within a force-constants parametrization of the bulk dynamics. By changing the surface force constants the authors are able to explain all the salient features appearing in the experimental time-of-flight spectra.
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