Electronic Resource
[S.l.]
:
International Union of Crystallography (IUCr)
Acta crystallographica
35 (1979), S. 861-870
ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
Variation of the diffraction conditions for neutrons in a rotating crystal frame is discussed. It is shown that the angle of deviation from the Bragg position varies with a rate equal to double the angular velocity of the crystal. This makes it possible to calculate the diffraction power for type-I Zachariasen mosaic crystals and then to obtain a solution of the Darwin equation for a rotating crystal slab with zero absorption. Further considerations refer to the space distribution of diffracted beam intensity. It is shown that, if a suitable experimental configuration is adopted, the structure factor modules can be determined from the intensity dependence on the angular velocity, and the result is independent of the mosaic-spread distribution in the sample. Results of experiments are presented.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739479001972
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