Inversion of the diffraction pattern from an inhomogeneously strained crystal using an iterative algorithm
Inversion of the diffraction pattern from an inhomogeneously strained crystal using an iterative algorithm
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DOI：
10.1103/physrevb.76.104106
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发表时间：
2007-09-01
影响因子：
3.7
通讯作者：
Thomas, O.
中科院分区：
文献类型：
--
作者：
Minkevich, A. A.;Gailhanou, M.;Thomas, O.
通过在迭代相位恢复算法中加入约束条件，得到了高度非均匀应变晶体中的位移场。这些约束包括直接的空间密度均匀，以及对位移场的不同分量的符号和导数的约束。将该算法应用于硅线阵列的高分辨率X射线衍射法测量的实验倒易空间图，得到的位移场分量与有限元模型计算的位移场分量非常吻合。
The displacement field in highly nonuniformly strained crystals is obtained by addition of constraints to an iterative phase retrieval algorithm. These constraints include direct space density uniformity and also constraints to the sign and derivatives of the different components of the displacement field. This algorithm is applied to an experimental reciprocal space map measured using high-resolution x-ray diffraction from an array of silicon lines, and the obtained component of the displacement field is in very good agreement with the one calculated using a finite element model.