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首页> 外文期刊>Crystallography reports >Study of x-ray diffraction from a surface acoustic wave in the grazing geometry with allowance for the curvature of the unperturbed crystal surface
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Study of x-ray diffraction from a surface acoustic wave in the grazing geometry with allowance for the curvature of the unperturbed crystal surface

机译：研究掠射几何中的表面声波产生的X射线衍射，并考虑到未扰动的晶体表面的曲率

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摘要

Fresnel X-ray diffraction from a concave crystal surface in the presence of a surface acoustic wave (SAW) has been considered for grazing angles of incidence in noncoplanar symmetric Laue geometry. It is shown that the main peak and diffraction satellites are focused at different distances from a crystal. The effect of deviation from the Bragg angle, the spectral line width, and the SAW amplitude on the X-ray diffraction pattern has been analyzed. It is established that the contrast of an X-ray diffraction pattern of an SAW in Bragg Laue grazing geometry is related to the character of irregularities of the crystal surface, and the pattern details depend on the measurement mode. The sensitivity of the method is about a nanometer. The focal image of the SAW serves as a scale landmark for determining the crystal surface characteristics.
机译：对于非共面对称劳厄几何学中的掠入射角，已经考虑了在表面声波（SAW）存在下从凹面晶体表面进行的菲涅耳X射线衍射。结果表明，主峰和衍射卫星聚焦在距晶体不同距离处。分析了布拉格角度，谱线宽度和SAW振幅偏离对X射线衍射图的影响。可以确定，在布拉格劳厄（Lagg Laue）掠射几何学中，声表面波的X射线衍射图谱的对比度与晶体表面的不规则性有关，并且图谱的细节取决于测量模式。该方法的灵敏度约为纳米。 SAW的焦点图像用作确定晶体表面特性的比例界标。

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