Electronic Resource
[S.l.]
:
International Union of Crystallography (IUCr)
Acta crystallographica
51 (1995), S. 354-360
ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
The interaction of X-rays in distorted anisotropic crystals is derived using a semi-classical approach based on Maxwell's equations. The X-ray wave is represented by a vector potential that is coupled to the charge and the magnetic moments of the electrons in the crystal by scattering factors obtained from non-relativistic quantum theory. Distortions are introduced through a slowly varying displacement field that shifts the positions of each unit cell in the crystal from its perfect-crystal position. The result is a generalization of the Takagi–Taupin equations in the form of a matrix equation for the electric field vector of the X-rays that includes magnetic scattering and the mixing of X-ray polarization states. The solutions of the equations in one-beam and two-beam cases are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108767394013218
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