Peculiarities of the diffraction contrast in plane-wave X-ray topographs of weakly deformed crystals in the bragg geometry

Journal Article · Thu Sep 15 00:00:00 EDT 2011 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774511050233· OSTI ID:22054266

Voloshin, A. E., E-mail: [e-mail] ^[1]

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1. Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

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.

• OSTI ID: 22054266
• Journal Information: Crystallography Reports, Vol. 56, Issue 5; Other Information: Copyright (c) 2011 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
GEOMETRY
INTERFERENCE
RESONANCE
RIEMANN FUNCTION
STRAINS
WAVE PROPAGATION
X RADIATION
X-RAY DIFFRACTION