Multiple wave scattering on a bordered crystal. Translation symmetry breaking and forbidden reflections
| Autoři | |
|---|---|
| Rok publikování | 2012 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | ACTA CRYSTALLOGRAPHICA SECTION A |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | https://journals.iucr.org/a/issues/2012/04/00/td5006/ |
| Doi | http://dx.doi.org/10.1107/S0108767312014705 |
| Klíčová slova | dynamical diffraction theory; forbidden reflections |
| Popis | 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. |
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