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Effect of strain in crystal on the forbidden reflections in the resonant diffraction of synchrotron radiation

机译:晶体应变对同步加速器辐射共振衍射中的禁反射的影响

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摘要

The effect of strain (either static or caused by long-wavelength acoustic oscillations) on the energy spectrum and the azimuthal dependence of the intensity of "forbidden" reflections in crystals at the energy of incident radiation close to the absorption edge is considered. It is shown that a strain causing a weak change in the unit-cell symmetry may additionally contribute to the tensor atomic factor. Examples of changes in the azimuthal dependence of forbidden-reflection intensity in zinc oxide ZnO and potassium dihydrogen phosphate KH _2PO _4 are considered.
机译:考虑了应变(静态的或由长波声振荡引起的)对能谱的影响,以及在接近吸收边的入射辐射能量下,晶体中“禁止”反射的强度与方位角的关系。结果表明,引起晶胞对称性微弱变化的应变还可能导致张量原子因子。考虑在氧化锌ZnO和磷酸二氢钾KH _2PO _4中禁止反射强度的方位角依赖性的变化的例子。

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