Multiple wave scattering on a bordered crystal. Translation symmetry breaking and forbidden reflections

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Authors	DUB P. LITZMAN Otto
Year of publication	2012
Type	Article in Periodical
Magazine / Source	ACTA CRYSTALLOGRAPHICA SECTION A
MU Faculty or unit	Faculty of Science
Citation
Web	https://journals.iucr.org/a/issues/2012/04/00/td5006/
Doi	http://dx.doi.org/10.1107/S0108767312014705
Keywords	dynamical diffraction theory; forbidden reflections
Description	The interaction of a scalar wave (thermal neutrons) with a single Si crystal is treated using Ewald's self-consistent field method. Considering from the very beginning the two-dimensional translation symmetry of the problem, the reflectivities of allowed and forbidden reflections in the Bragg geometry valid for both coplanar and non-coplanar cases are derived. It is shown that there exists a very narrow reflectivity peak of the forbidden reflection as a result of the symmetry breaking due to a crystal surface.
Related projects:	CEITEC - Central European Institute of Technology