Peculiarities of the Diffraction Contrast in Plane-Wave X-Ray Topographs of Weakly Deformed Crystals in the Bragg Geometry

被引:1
|
作者
Voloshin, A. E. [1 ]
机构
[1] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
关键词
GROWTH STRIATIONS; DYNAMICAL THEORY; SILICON; DEFORMATION; ATOMS; PLATE;
D O I
10.1134/S1063774511050233
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
The regularities of the topographic contrast formation in weakly deformed nonabsorbing crystals in the Bragg geometry for the diffraction of a plane X-ray wave have been investigated by the method of Riemann functions. It is shown that in this case the extinction contrast has an interference character, alternates, and is proportional to the strain gradient rather than to the squared strain (like in the case of strong lattice distortions). The data of the analysis are compared with the results of a model numerical experiment. The possibility of implementing an X-ray-acoustic resonance in the Bragg geometry is shown. DOI: 10.1134/S1063774511050233
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页码:802 / 810
页数:9
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