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Untangling diffraction intensity: modulation enhanced diffraction on ZrO 2 powder
Author(s) -
van Beek Wouter,
Emerich Hermann,
Urakawa Atsushi,
Palin Luca,
Milanesio Marco,
Caliandro Rocco,
Viterbo Davide,
Chernyshov Dmitry
Publication year - 2012
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/s0021889812018109
Subject(s) - diffraction , intensity (physics) , scattering , modulation (music) , context (archaeology) , computational physics , optics , perturbation (astronomy) , physics , intensity modulation , materials science , crystal (programming language) , computer science , phase modulation , quantum mechanics , acoustics , paleontology , phase noise , biology , programming language
This paper describes a new method for extracting the individual contributions to the diffracted intensity of subsets of atoms in the crystal structure. The periodic perturbation of the scattering process, required for untangling the scattered intensity, is provided by altering the resonant contributions. The theory of modulation enhanced diffraction (MED) is briefly recalled in the context of resonant scattering. A periodic variation in the atomic form factor has been achieved by changing the X‐ray energy in such a way that the MED theory holds. Simulated results and experimental data are presented, together with necessary corrections. Two data analysis schemes are presented, both illustrating the advantages and drawbacks of the novel modulation technique.