Evanescent absorption in kinematic surface Bragg diffraction
- 15 February 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 35 (5), 2137-2143
- https://doi.org/10.1103/physrevb.35.2137
Abstract
The Bragg scattering excited under the conditions of total external reflection is discussed within a kinematic approach based on the distorted-wave approximation. Due to evanescent absorption at grazing angles the maximum of the interference function of the surface Bragg reflection is displaced into the vacuum by an amount determined by the mean electron density of the medium. X-ray scattering experiments performed on a mosaic single crystal with synchrotron radiation confirm the predictions of the kinematic theory and indicate the potential for obtaining structural information on the first atomic layers. DOI: http://dx.doi.org/10.1103/PhysRevB.35.2137 © 1987 The American Physical SocietyKeywords
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