Difference between revisions of "Secondary extinction"
From Online Dictionary of Crystallography
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| − | <Font color="blue">Extinction secondaire</Font> (''Fr''). <Font color="black">Estinzione secondaria</Font> (''It''). | + | <Font color="blue">Extinction secondaire</Font> (''Fr''). <Font color="black">Estinzione secondaria</Font> (''It'').<Font color="purple">２次消衰効果</Font> (''Ja''). |
| − | + | '''Secondary extinction''' is responsible for the loss of intensity occurring when the incident beam crosses a crystal. Each plane of a family (''hkl'') satisfying [[Laue equations]] (or [[Bragg's law]]) diffracts the incident beam, and thus subtracts part of the intensity from the incident beam. Successive planes of the same family will then experience a weakening of the incident beam and as a consequence the diffracted beams will result from the positive interference of waves not having the same intensities, as it is instead considered by the [[kinematical theory]]. | |
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Secondary extinction is equivalent to an increase of the linear absorption coefficient and is negligible for sufficiently small crystals. | Secondary extinction is equivalent to an increase of the linear absorption coefficient and is negligible for sufficiently small crystals. | ||
==See also== | ==See also== | ||
| − | [[Primary extinction]] | + | *[[Mosaic crystal]] |
| + | *[[Primary extinction]] | ||
[[Category:X-rays]] | [[Category:X-rays]] | ||
Revision as of 10:27, 17 May 2017
Extinction secondaire (Fr). Estinzione secondaria (It).２次消衰効果 (Ja).
Secondary extinction is responsible for the loss of intensity occurring when the incident beam crosses a crystal. Each plane of a family (hkl) satisfying Laue equations (or Bragg's law) diffracts the incident beam, and thus subtracts part of the intensity from the incident beam. Successive planes of the same family will then experience a weakening of the incident beam and as a consequence the diffracted beams will result from the positive interference of waves not having the same intensities, as it is instead considered by the kinematical theory.
Secondary extinction is equivalent to an increase of the linear absorption coefficient and is negligible for sufficiently small crystals.