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A comparison of the merits of isotopic substitution in neutron small‐angle scattering and anomalous X‐ray scattering for the evaluation of partial structure functions in a ternary alloy
Author(s) -
Simon J. P.,
Lyon O.,
De Fontaine D.
Publication year - 1985
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/s0021889885010196
Subject(s) - scattering , small angle neutron scattering , neutron scattering , alloy , neutron , ternary operation , biological small angle scattering , neutron diffraction , anomalous scattering , materials science , computational physics , chemistry , optics , physics , nuclear physics , diffraction , metallurgy , computer science , programming language
Solute partitioning during decomposition of a ternary alloy may be evaluated through the inversion of a system of linear equations, obtained by performing at least three independent small‐angle scattering experiments. The merits of neutron scattering (with isotopic contrast) and of anomalous X‐ray scattering (near the absorption edges) are compared. It appears that neutron scattering, although having good contrast, is not suited to these studies since slight structural differences between the three samples may lead to erroneous results. On the other hand, the use of the same sample in anomalous scattering avoids this problem, but with the drawback of a more ill‐conditioned system. Nevertheless, the possibility of performing more than three anomalous experiments may improve the results and a new analysis of data is proposed.