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A layer‐coupling model for neutron reflectivity and transmissivity calculation in deformed mosaic crystals
Author(s) -
Hu H.C.
Publication year - 1992
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/s0021889892005648
Subject(s) - bent molecular geometry , extinction (optical mineralogy) , optics , neutron , coupling (piping) , materials science , absorption (acoustics) , layer (electronics) , reflectivity , mosaic , crystal (programming language) , molecular physics , bragg's law , orientation (vector space) , crystallography , physics , geometry , chemistry , diffraction , nanotechnology , mathematics , composite material , nuclear physics , archaeology , computer science , history , programming language
A new layer‐coupling model is developed for the derivation of the neutron reflectivity and transmissivity for deformed mosaic crystals with absorption in asymmetrical Bragg and Laue geometries. In this model, the mosaic distribution, domain size and crystalline orientation of each layer within the crystal can be different. Correction for primary extinction can also be included. Rocking curves for bent mosaic crystals predicted here based on known parameters are presented together with experimental results to shown the validity of this model.