Point-defect-induced forbidden reflections in resonant X-ray scattering.
J Synchrotron Radiat
; 10(Pt 5): 376-9, 2003 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-12944625
ABSTRACT
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.
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Base de dados:
MEDLINE
Assunto principal:
Espalhamento de Radiação
/
Difração de Raios X
/
Modelos Moleculares
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
J Synchrotron Radiat
Assunto da revista:
RADIOLOGIA
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Federação Russa