EXPERIMENTAL AND THEORETICAL advances in the study of x‐ray diffraction at small angles both started about 30 years ago. With the focusing crystal monochromator experimenters could obtain the intensity and resolution they needed to resolve the diffraction pattern close to the primary beam. Now many other methods allow a study of this kind of scattering. And application of the form‐factor concept in scattering theory provided a statistical measure for the average size and shape of the small grains that are responsible for this kind of scattering.

Topics
X-ray diffraction, Crystal monochromators, Electromagnetic interactions, Scattering theory, X-ray scattering
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© 1969 American Institute of Physics.
1969
American Institute of Physics
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