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The dynamical theory of diffraction in a crystal modulated by a surface acoustic wave in the case of spatially restricted X‐ray beams
Author(s) -
Punegov Vasily I.
Publication year - 2019
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576719012603
Subject(s) - diffraction , reciprocal lattice , dynamical theory of diffraction , diffraction topography , physics , surface acoustic wave , crystal (programming language) , optics , surface (topology) , x ray crystallography , rayleigh scattering , computational physics , acousto optics , geometry , mathematics , computer science , diffraction grating , programming language
The dynamical theory of X‐ray diffraction in a crystal modulated by a surface acoustic wave (SAW) is developed for spatially restricted beams. It is shown that this approach is applicable to X‐ray reciprocal space mapping. Rayleigh's surface‐wave model is used to describe ultrasonic excitation. Based on the recurrent relations, a numerical simulation of the dynamical diffraction in a crystal modulated by a SAW is performed. Within the framework of the triple‐axis diffraction scheme, the effect of the instrumental function on X‐ray diffraction data is studied.