Accession Number:

ADA159942

Title:

Helium Scattering Studies of the Surface Structure and Dynamics of Rare Gas Crystals,

Descriptive Note:

Corporate Author:

CHICAGO UNIV IL JAMES FRANCK INST

Personal Author(s):

Report Date:

1985-08-01

Pagination or Media Count:

34.0

Abstract:

This report reviews experiments involving He scattering from the surfaces of ordered rare gas overlayers physisorbed on Ag111. The series of rare gases studied were Ar, Kr, and Xe. The measurements were performed on thin film structures which were grown on a layer-by-layer basis, from monolayer to thick film, in order to study how the surface properties changed with increasing distance from the substrate. Three types of experiments are discussed elastic diffraction, selective adsorption, and inelastic single phonon scattering by angle-resolved time-of-flight. These experiments, taken together, provide a broad overview of the static and dynamic surface properties of rare gas overlayers. They also provide information about the forces which govern the adatom-adatom and adatom-substrate interactions. Originator supplied keywords include Surface phonon dispersion relations Helium diffraction Selective adsorption Rare gas interaction potentials Thin film dynamics Gas-surface energy exchange Wetting.

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE