THE INFLUENCE OF SPECULAR INTERFACE REFLECTION ON GRAZING-INCIDENCE X-RAY-DIFFRACTION AND DIFFUSE-SCATTERING FROM SUPERLATTICES

Citation
Gt. Baumbach et al., THE INFLUENCE OF SPECULAR INTERFACE REFLECTION ON GRAZING-INCIDENCE X-RAY-DIFFRACTION AND DIFFUSE-SCATTERING FROM SUPERLATTICES, Physica. B, Condensed matter, 198(1-3), 1994, pp. 249-252
Citations number
3
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
09214526
Volume
198
Issue
1-3
Year of publication
1994
Pages
249 - 252
Database
ISI
SICI code
0921-4526(1994)198:1-3<249:TIOSIR>2.0.ZU;2-Q
Abstract
Superlattices (SL) with a large difference in the refractive index bet ween the alternating layers give rise to specular reflection from the intrinsic interfaces of the SL which proves very efficient for small i ncident or exit angles near the critical angle of total external refle ction. This influences the intensity of grazing incidence X-ray diffra ction (GID) and non-specular X-ray scattering (NSXR). Additional peaks were found besides the common features. They are explained by waves s cattered in transmission geometries and measured above the sample surf ace due to subsequent specular interface reflection. The experimental findings are interpreted by Umweganregung in terms of the distorted wa ve Born approximation (DWBA).