Title: McRae's multiple-scattering approach extended to electron scattering by molecules
Abstract: McRae's (1967) approach to multiple scattering by crystals is re-examined in order to adapt it to elastic scattering of electrons by molecules, the ultimate goal being to treat chiral electron scattering which would be difficult by standard electron-molecule theories. His working equation is shown to be exact provided his definition of the effective partial scattering amplitude is amended properly. The Fourier transform of a scattered wave from constituent atoms is then expanded in terms of spherical harmonics, the expansion conforming with his assumption that the scattered wave can be expressed by a superposition of plane waves of a fixed wavenumber. An approximate yet practicable set of coupled linear equations for the expansion coefficients is derived. In the double-scattering approximation the cross section is expressed in terms of the modified scattering amplitudes, falpha ( beta ) for atom alpha which reflects double-scattering effects due to atom beta . A resonance-like behaviour is qualitatively discussed.
Publication Year: 1987
Publication Date: 1987-12-14
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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