| Autor: |
Punegov VI; Institute of Physics and Mathematics, Federal Research Center `Komi Scientific Center', the Ural Branch of the Russian Academy of Sciences, Kommunisticheskaya Street 24, Syktyvkar 167982, Russian Federation., Karpov AV; Institute of Physics and Mathematics, Federal Research Center `Komi Scientific Center', the Ural Branch of the Russian Academy of Sciences, Kommunisticheskaya Street 24, Syktyvkar 167982, Russian Federation. |
| Jazyk: |
angličtina |
| Zdroj: |
Acta crystallographica. Section A, Foundations and advances [Acta Crystallogr A Found Adv] 2021 Mar 01; Vol. 77 (Pt 2), pp. 117-125. Date of Electronic Publication: 2021 Jan 19. |
| DOI: |
10.1107/S2053273320015715 |
| Abstrakt: |
Using the formalism of dynamical scattering of spatially restricted X-ray fields, the diffraction of a microbeam in a crystal with boundary functions for the incident and reflected amplitudes was studied in the case of geometrical optics and the Fresnel approximation (FA). It is shown that, for a wide front of the X-ray field, the angular distributions of the scattered intensity in the geometrical optics approximation (GOA) and the FA are approximately the same. On the other hand, it is established that, for a narrow exit slit in the diffraction scheme, it is always necessary to take into account the X-ray diffraction at the slit edges. Reciprocal-space maps and the distribution of the diffraction intensity of the microbeam inside the crystal were calculated. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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