Dynamical effects in the integrated X‐ray scattering intensity from imperfect crystals in Bragg diffraction geometry. II. Dynamical theory

The analytical expressions for coherent and diffuse components of the integrated reflection coefficient are considered in the case of Bragg diffraction geometry for single crystals containing randomly distributed microdefects. These expressions are analyzed numerically for the cases when the instrum...

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Bibliographic Details
Published in:Acta crystallographica. Section A, Foundations and advances Foundations and advances, 2021-09, Vol.77 (5), p.433-452
Main Authors: Molodkin, V. B., Olikhovskii, S. I., Dmitriev, S. V., Lizunov, V. V.
Format: Article
Language:English
Subjects:
Bragg diffraction geometry
Crystal defects
Crystal structure
Crystals
Diffraction
diffuse scattering
dynamical theory of X‐ray diffraction
Mathematical analysis
microdefects
primary extinction
Reflectance
Scattering
Single crystals
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Summary:The analytical expressions for coherent and diffuse components of the integrated reflection coefficient are considered in the case of Bragg diffraction geometry for single crystals containing randomly distributed microdefects. These expressions are analyzed numerically for the cases when the instrumental integration of the diffracted X‐ray intensity is performed on one, two or three dimensions in the reciprocal‐lattice space. The influence of dynamical effects, i.e. primary extinction and anomalously weak and strong absorption, on the integrated intensities of X‐ray scattering is investigated in relation to the crystal structure imperfections. A theoretical analysis is carried out of the influence of microdefects on the dynamical effects of primary extinction and anomalous absorption in the integrated intensities of coherent and diffuse scattering of X‐rays by imperfect crystals in Bragg diffraction geometry.
ISSN:2053-2733
0108-7673
2053-2733
DOI:10.1107/S2053273321005775