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Semiclassical theories and quantum hardwall calculation of atom surface scattering

Journal Article · · J. Vac. Sci. Technol., v. 13, no. 1, pp. 355-359
DOI:https://doi.org/10.1116/1.568879· OSTI ID:4022659
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A semiclassical formalism for atom and electron scattering from solid surfaces is presented and compared to exact quantum calculations for scattering from a sinusoidal hardwall and to experimental scattering distributions for thermal helium and neon beams scattered from W<112>. The helium results are well represented by elastic calculations, but large inelastic effects are evident in the neon scattering. The semiclassical calculations for the hardwall are in agreement with the exact quantum results to within a few percent. Qualitatively, either a specularly dominated distribution or a rainbow pattern is predicted, depending on the k vector and the amplitude of the surface periodicity. A preliminary attempt to apply this formalism to low-energy electron scattering from Ni(100) is also presented. The results, while not in exact agreement with more conventional dynamic LEED calculations, do reproduce absolute peak positions to within 7 V. (AIP)

Research Organization:
Department of Chemical Engineering, University of California, Berkeley, California 94720
Sponsoring Organization:
USDOE
NSA Number:
NSA-33-031017
OSTI ID:
4022659
Journal Information:
J. Vac. Sci. Technol., v. 13, no. 1, pp. 355-359, Journal Name: J. Vac. Sci. Technol., v. 13, no. 1, pp. 355-359; ISSN JVSTA
Country of Publication:
United States
Language:
English

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Related Subjects

*ATOM COLLISIONS-- ELASTIC SCATTERING
*ELECTRON COLLISIONS-- ELASTIC SCATTERING
*HELIUM-- COLLISIONS
*NEON-- COLLISIONS
*TUNGSTEN-- ELECTRON COLLISIONS
640301* --Physics Research--Atomic
Molecular &amp; Chemical Physics--Beams &amp; Their Reactions
ELECTRON DIFFRACTION
FEYNMAN PATH INTEGRAL
N60100* --Physics (Atomic &amp; Molecular)--Atomic
Electron
Ion &amp; Molecular Beams &amp; Reactions
QUANTUM MECHANICS
SEMICLASSICAL APPROXIMATION
SURFACES
WAVE FUNCTIONS