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Measurement of the Anomalous Absorption Coefficients in the Bragg Case by a Three‐Crystal X‐Ray Spectrometer
Author(s) -
ZielińskaRohozińska E.
Publication year - 1965
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19650120224
Subject(s) - spectrometer , crystal (programming language) , absorption (acoustics) , x ray , beam (structure) , radiation , optics , physics , bragg's law , divergence (linguistics) , intensity (physics) , absorption spectroscopy , single crystal , analytical chemistry (journal) , atomic physics , chemistry , materials science , nuclear magnetic resonance , diffraction , chromatography , computer science , programming language , linguistics , philosophy
The anomalous absorption coefficients \documentclass{article}\pagestyle{empty}\begin{document}$ \tilde \sigma _2 $\end{document} are measured for 220 and 111 Bragg reflections of Si single crystals for CuK α 1radiation. The measurements are made with a three‐crystal X‐ray spectrometer which allows the relative angular position of the crystal under investigation to be controlled to within ±1″. The method of measurement consists of comparing intensity values in the maximum transmitted beam for various thicknesses in the range 0 ≤ σ 2min D ≤ 12. The effect of primary beam divergence on the values of the measured anomalous absorption coefficients is estimated using the theory of the three‐crystal X‐ray spectrometer.