A theory of He diffraction and resonance scattering from Cu(115) by the complex coordinate method

Our method for computing specular elastic scattering intensities of atomic beams from a periodically corrugated solid surface, is generalized to include nonspecular diffraction intensities, and is applied to the scattering of a helium beam from the Cu(115) surface for resonance as well as off-resona...

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Bibliographic Details
Published in:The Journal of chemical physics 1991-01, Vol.94 (2), p.1636-1642
Main Authors: Engdahl, Erik, Moiseyev, Nimrod, Maniv, Tsofar
Format: Article
Language:English
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Summary:Our method for computing specular elastic scattering intensities of atomic beams from a periodically corrugated solid surface, is generalized to include nonspecular diffraction intensities, and is applied to the scattering of a helium beam from the Cu(115) surface for resonance as well as off-resonance incident angles. Using a simple corrugated Morse potential with a one-dimensional corrugation function and reasonable values of its parameters, a remarkable agreement with the experimental resonance line shapes over the entire angular range is obtained for both the specular and a nonspecular diffraction channel. The line shapes are found to be extremely sensitive to the corrugation strength parameter, but quite insensitive to the shape of the surface corrugation.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.459967