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- W3139561868 abstract "AbstractAlL and OK near edge fine structures in sapphire are studied using electron energy loss microspectroscopy in a transmission electron microscope;an analysis of the electronic populations of atoms Al and O,and a comparison between different partial cross sections are given.We consider the ionization of an atom in a homogeneous solid to interpret the elemental effects in the ionization region near edges.The chemical effects in the region near edge onset are interpreted by using extended Huckel molecular orbital theory and Bloch's theorem including the effects of translation symmetry in crystals to calculate the electronic transitions from core shell to unoccupied valence shell.We also consider the additional chemical effects, which arise from the elastic backscattering of the atomic ionization waves by the atoms neighboring the exited atom,giving rise to the so called extended fine structure in the ionization region.The agreement between the calculated results and the experimental energy loss spectra of sapphire from single phase region is good." @default.
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- W3139561868 date "1998-01-01" @default.
- W3139561868 modified "2023-09-25" @default.
- W3139561868 title "ANALYSIS OF NEAR EDGE FINE STRUCTURE AND ELECTRONIC POPULATIONS IN SAPPHIRE" @default.
- W3139561868 hasPublicationYear "1998" @default.
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