Inelastic helium scattering from Ag(001) and Ag(001)c(2 x 2)Cl

Journal Article · Sun Apr 01 04:00:00 EST 1984 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.572656· OSTI ID:6719246

Lambert, W R; Trevor, P L; Doak, R B; Cardillo, M J

Inelastic helium atom scattering has been used to investigate Ag(001) surface phonon modes and the influence of an adsorbed chlorine monolayer. For the Ag(001) surface we observe the preferential interaction of the He beam with shear-vertically (SV) polarized surface phonons. The scattered intensity per steradian from the Ag(001)c(2 x 2)Cl surface is reduced approximately two orders of magnitude compared to that for the clean surface. Our results for the chlorinated surface indicate that a SV polarized surface mode does not appear significantly below the lower bulk band edge in contrast to oxygen adsorbed on Ni(001). Although we did not observe high energy surface vibrations, based on these experiments and recent theoretical developments, we indicate conditions which would improve the observability of high energy surface vibrations by means of inelastic He scattering.

• Research Organization: Bell Laboratories, Murray Hill, New Jersey 07974
• OSTI ID: 6719246
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 2:2; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ADSORPTION
ATOM COLLISIONS
CHLORINE
COLLISIONS
ELEMENTS
FLUIDS
GASES
HALOGENS
HELIUM
INELASTIC SCATTERING
METALS
NICKEL
NONMETALS
OXYGEN
PHONONS
POLARIZATION
QUASI PARTICLES
RARE GASES
SCATTERING
SILVER
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
SURFACES
TRANSITION ELEMENTS