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Interpretation of bent‐crystal rocking curves
Author(s) -
Popovici M.,
Stoica A. D.,
Chalupa B.,
Mikula P.
Publication year - 1988
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/s0021889888001293
Subject(s) - bent molecular geometry , interpretation (philosophy) , crystal (programming language) , crystallography , materials science , chemistry , computer science , composite material , programming language
The optics of successive Bragg reflection by two bent crystals is considered in the lamellar approximation. The optimal curvatures ensuring minimal rocking‐curve widths and good reflection efficiencies are determined. The conditions under which a rocking curve reproduces the reflectivity curve of a bent crystal are indicated. Analytical formulae for the rocking‐curve width and peak intensity are derived for three simple limiting cases. The computations are supported by experimental results obtained with bent perfect silicon crystals.