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原子的芯能级电子吸收能量后被激发 ,经过退激发过程发射出的俄歇电子波在传播过程中被周围的原子散射 ,带有周围原子结构信息的散射波 (物波 )与未被散射的电子波 (参考波 )相干涉形成的衍射图即俄歇电子全息图 ,通过全息图的重现 ,可获得原子级分辨率的三维结构信息。本文在合理的物理模型下 ,以Cu单晶以及高温超导YBCO中的Y原子近邻的一些原子簇为计算实例 ,首次就受激原子周围单层近邻原子散射和多层原子散射产生的俄歇电子全息进行了计算机模拟和数值重现 ,获得了三维晶格结构参量 ,并讨论了不同原子序数的原子在全息图形成及重现中的作用。本工作有助于材料微结构的研究
Atoms of the core energy level after the electron is excited by the energy absorbed, the Auger wave emitted by the de-excitation process is scattered by the surrounding atoms in the process of scattering, the scattering wave (matter wave) with the surrounding atomic structure information is not scattered (Reference wave) interference diffraction pattern formed Auger electron hologram, through the reproduction of the hologram, atomic resolution can be obtained three-dimensional structure information. In this paper, a reasonable physical model to Cu single crystal and YBCO high temperature superconducting Y atoms in the vicinity of some clusters as an example, the first time around the excited atoms around the single-layer atomic scattering and atomic scattering generated by Auger The electronic holography was simulated by computer and numerically reproduced. The three-dimensional lattice structure parameters were obtained. The roles of atoms with different atomic numbers in the formation and reproduction of holograms were also discussed. This work contributes to the study of material microstructure