FORBIDDEN/NON-FORBIDDEN BRAGG REFLECTIONS STUDY UNDER PHASE TRANSITIONS AND EXTERNAL INFLUENCESстатья
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Дата последнего поиска статьи во внешних источниках: 10 августа 2021 г.
Аннотация:A method has recently been developed that demonstrates a record sensitivity to atomic displacement, which uses a study of the energy dependence near the absorption edges of weak Bragg reflections [1]. In this method, the anisotropic properties of resonant X-ray scattering are neglected. However, the resonant anisotropic contribution to the scattering amplitude always exists, although it is small compared with charge scattering. We propose to use polarization analysis to study the resonant scattering of ʍ-polarized radiation into ʋpolarization in allowed reflections. The ʍ-ʋ channel is not forbidden in resonant X-ray scattering close to the absorption edges, in contrast to the conventional Thomson scattering. The study of this scattering channel can provide additional information when studying phase transitions and the effects of external influences on crystals.