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A comparison between the variances of the Cu K α and Fe K α spectral distributions
Author(s) -
Edwards H. J.,
Langford J. I.
Publication year - 1971
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/s0021889871006216
Subject(s) - multiplet , variance (accounting) , range (aeronautics) , spectral power distribution , line (geometry) , mathematics , distribution (mathematics) , spectral line , filter (signal processing) , statistics , computational physics , analytical chemistry (journal) , physics , chemistry , materials science , optics , mathematical analysis , computer science , geometry , quantum mechanics , accounting , chromatography , business , composite material , computer vision
The variance of the X‐ray spectral distribution in the Cu K α multiplet has been redetermined with improved accuracy and over a wider range than previously. This investigation is parallel to that of Edwards & Toman on iron radiation, with which comparison is made on the following points: (i) the effect of using a β‐filter and (ii) the effect of interpolating the line profile under the K α satellite group. Both definitions of the variance are considered and three linear regions can generally be distinguished in the variance–range function. The choice of definition and the usefulness of the different linear regions in any practical application are also discussed.