ISSN:
1600-5767
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Geosciences
,
Physics
Notes:
A double-channel X-ray standing-wave technique has been suggested. It reduces to simultaneous recording of photoelectrons and fluorescence radiation coming from a crystal under the conditions of X-ray diffraction. The use of a coincidence circuit allows one to obtain fluorescence radiation from small depths of electron escape and to eliminate distortions of fluorescence angular dependence owing to X-ray extinction. The double-channel X-ray standing-wave method was used to record the fluorescence yield curves free of extinction distortions from gadolinium and gallium atoms occupying different lattice positions in gallium-gadolinium garnet. The positions of impurity terbium atoms in yttrium–aluminium garnet have been determined. The influence of indirect excitation of a secondary radiation on the angular yield curves obtained has also been considered.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0021889890008408
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