Site-Specific Extinction Rule for Kikuchi Bands in X-ray Photoelectron Diffraction.

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  • Omori Shinji
    Institute of Industrial Science, University of Tokyo, 7–22–1 Roppongi, Minato–ku, Tokyo 106, Japan
  • Ishii Hideshi
    Institute of Industrial Science, University of Tokyo, 7–22–1 Roppongi, Minato–ku, Tokyo 106, Japan
  • Nihei Yoshimasa
    Institute of Industrial Science, University of Tokyo, 7–22–1 Roppongi, Minato–ku, Tokyo 106, Japan

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  • Site-Specific Extinction Rule for Kikuc

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The anomalous extinction of specific Kikuchi bands has been recently observed in the X-ray photoelectron diffraction (XPED) pattern for F1s emission from a CaF2(111) surface, even though the corresponding structure factors are not zero. To explain this phenomenon, we have derived a novel extinction rule and have shown that the extinction of Kikuchi bands in XPED depends not only on the structure factors but also on the lattice sites of source atoms. This rule can be used to locate the lattice sites of impurities in single-crystal substrates.

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