Absorption and secondary scattering of X-rays with an off-axis small beam for a cylindrical sample geometry
Absorption and secondary scattering of X-rays with an off-axis small beam for a cylindrical sample geometry
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用于圆柱形样品几何形状的离轴小光束的 X 射线吸收和二次散射
DOI：
10.1107/s2053273318017710
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Kelton, Kenneth F.
中科院分区：
文献类型：
--
作者：
Van Hoesen, Daniel C.;Bendert, James C.;Kelton, Kenneth F.
X射线吸收和二次散射的表达式开发圆柱形样品的几何形状。假设入射光束的尺寸小于样品，并且通常偏离轴指向圆柱形样品。结果表明，偏移光束的吸收和多重散射项上有一个不可忽略的影响，导致在一个不对称的校正，必须施加到测量的散射强度。首先给出了修正量的积分形式。为了便于计算，提出了一个小梁极限。
Expressions for X-ray absorption and secondary scattering are developed for cylindrical sample geometries. The incident-beam size is assumed to be smaller than the sample and in general directed off-axis onto the cylindrical sample. It is shown that an offset beam has a non-negligible effect on both the absorption and multiple scattering terms, resulting in an asymmetric correction that must be applied to the measured scattering intensities. The integral forms of the corrections are first presented. A small-beam limit is then developed for easier computation.