Open AccessPoint‐defect‐induced forbidden reflections in resonant X‐ray scattering
Author(s) -
Dmitrienko Vladimir E.,
Ovchinnikova Ele.
Publication year - 2003
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049503011622
Subject(s) - scattering , anisotropy , bragg's law , crystallographic defect , physics , absorption (acoustics) , deformation (meteorology) , condensed matter physics , atomic physics , optics , diffraction , meteorology
Point defects in crystals cause displacements of neighbouring atoms and hence become the source of an additional anisotropy of the X‐ray resonant scattering amplitude. This anisotropy can induce `forbidden' Bragg reflections near absorption edges, called point‐defect‐induced (PDI) reflections, which are absent in non‐resonant X‐ray scattering and in resonant X‐ray scattering by perfect crystals. The deformation of external electron shells is the physical reason for this phenomenon. Some examples of crystals are considered in which the PDI reflections could be observed.