A criterion for the dynamical to kinematical transition of x-ray diffraction on a bent crystal [report]

V.I. Kushnir, A.T. Macrander
1993 unpublished
DISCLAIMER This report was prepared as an account of work sponsored-by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulnes_ of any information, apparatus, product, or process disclosed, or represents that its use would not infringe priw,tely owned rights. Reference herein to any
more » ... ic commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those ol the United States Government or any agency thereof. A criterion is given in answer to the question: "To what extent is it possible co bend a crystal without loss of X-ray peak retlectivity? " An expression based on the work of Chukhovskii, Gabrielyan and Petrashen [1], is formulated that applies to anisotropic cubic crystal and that can be used not only for conventional asymmetric Bragg diffraction, but also for inclined crystal diffraction. The following special cases are treated as examples: isotropic crystal, standard symmetrical Bragg diffraction, extremely asymmetric diffraction, and backscattering with Bragg angles near 90°. In addition, an asymptotic behavior tror high energies is detailed.
doi:10.2172/10188471 fatcat:keudozamszbrjikonsuole6gou