We report accurate measurements of the dependence of the specular reflectivity on surface temperature and on incident angle, for He scattering off Pt(111). The usual Debye-Waller formula with a Beeby correction fits the data, provided that the effective well depth is adjusted. We show that a full calculation of the Debye-Waller exponent also reproduces the data. The inelastic atom-surface interaction and the surface phonon spectrum used in the calculation are the ones that reproduce the time-of-flight data obtained in separate experiments. No further adjustable parameters are needed.

Debye-Waller factor for He/Pt(111) / Bortolani, Virginio; Celli, V.; Franchini, Anna; Idiodi, J.; Santoro, Giorgio; Kern, K.; Poelsema, B.; Comsa, G.. - In: SURFACE SCIENCE. - ISSN 0039-6028. - STAMPA. - 208:(1989), pp. 1-12. [10.1016/0039-6028(89)90033-2]

Debye-Waller factor for He/Pt(111)

BORTOLANI, Virginio;FRANCHINI, Anna;SANTORO, Giorgio;
1989-01-01

Abstract

We report accurate measurements of the dependence of the specular reflectivity on surface temperature and on incident angle, for He scattering off Pt(111). The usual Debye-Waller formula with a Beeby correction fits the data, provided that the effective well depth is adjusted. We show that a full calculation of the Debye-Waller exponent also reproduces the data. The inelastic atom-surface interaction and the surface phonon spectrum used in the calculation are the ones that reproduce the time-of-flight data obtained in separate experiments. No further adjustable parameters are needed.
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Debye-Waller factor for He/Pt(111) / Bortolani, Virginio; Celli, V.; Franchini, Anna; Idiodi, J.; Santoro, Giorgio; Kern, K.; Poelsema, B.; Comsa, G.. - In: SURFACE SCIENCE. - ISSN 0039-6028. - STAMPA. - 208:(1989), pp. 1-12. [10.1016/0039-6028(89)90033-2]
Bortolani, Virginio; Celli, V.; Franchini, Anna; Idiodi, J.; Santoro, Giorgio; Kern, K.; Poelsema, B.; Comsa, G.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/452126
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