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- W2054120823 abstract "In the phenomenon of diffraction of an electromagnetic wave in a lattice, the phase relations between the transmitted wave and the diffracted wave are fundamental. A vector can be written that describes the quantum state of the radiation in the above-mentioned case, and the photoelectric absorption cross section can be computed. It will be proved that the way the dynamical theory of x-ray diffraction deals with absorption is not correct because it does not consider the interference between the ensuremath{alpha} and ensuremath{beta} rays; this phenomenon causes the failure of the dynamical theory in the explication of the Borrmann effect, which will be explained by means of a theory proposed herein. In addition, a new phenomenon is described that is not expected by the dynamical theory, the coherent scattering of photons from the ensuremath{beta} ray to the ensuremath{alpha} ray; such a phenomenon is the real origin of the ensuremath{beta}-ray extinction in the crystal and a quite anomalous expression for the extinction depth is found that is inversely proportional to the incident intensity." @default.
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- W2054120823 date "1990-10-01" @default.
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- W2054120823 title "Quantum theory of the Borrmann effect" @default.
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- W2054120823 doi "https://doi.org/10.1103/physreva.42.3695" @default.
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