x-rays: explain diffraction vs coherent scatter

L. D. Marks L-marks at nwu.edu
Thu Aug 31 13:58:11 EST 2000


While it is true that there is no difference between Rayleigh and Bragg
scattering in many respects, this is only part of the answer. Bragg
diffraction
as used for x-ray diffraction refers primarily to the case when the wave
scattered from different regions add coherently to give a large nett
intensity.
Rayleigh scattering is, I think, more for the case when the scattering
from different regions adds incoherently. A loose analogy would be to
compare Rayleigh scattering to what one has from an amorphous material,
versus Bragg diffraction from a crystal.

-- 
Laurence Marks
Department of Materials Science and Engineering
Northwestern University
fax: (847) 491-7820
mailto:L-marks at northwestern.edu
http://www.numis.nwu.edu







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