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Aberration corrections for non‐Bragg–Brentano diffraction geometries
Author(s) -
Rowles Matthew R.,
Buckley Craig E.
Publication year - 2017
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576717000085
Subject(s) - optics , diffraction , bragg's law , reflection (computer programming) , physics , debye , orientation (vector space) , beam (structure) , displacement (psychology) , geometry , computational physics , mathematics , computer science , condensed matter physics , psychology , psychotherapist , programming language
The construction of peak intensity, profile and displacement aberration functions based on the geometry of a powder diffraction measurement allows for physically realistic corrections to be applied in Rietveld modelling through a fundamental parameters approach. Parallel‐beam corrections for asymmetric reflection and Debye–Scherrer geometry are summarized, and corrections for thin‐plate transmission are derived and validated. Geometrically correct implementations of preferred orientation models are also summarized.