Site-dependent Si KL{sub 23}L{sub 23} resonant Auger electron spectra following inner-shell excitation of Cl{sub 3}SiSi(CH{sub 3}){sub 3}
- Department of Chemistry, Faculty of Science, Ehime University, Matsuyama 790-8577 (Japan)
- Institute for Sustainable Science and Development, Hiroshima University, Higashi-Hiroshima 739-8526 (Japan)
- Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun 679-5198 (Japan)
Spectator resonant Auger electron spectra with the Si 1s photoexcitation of Cl{sub 3}SiSi(CH{sub 3}){sub 3} have been measured using an electron spectroscopic technique combined with undulator radiation. The transition with the highest intensity in the total ion yield (TIY) spectrum, coming from excitation of a Si 1s electron on the Cl-side into a vacant valence orbital, generates the resonant Auger decay in which the excited electron remains in this valence orbital. Photoexcitation of 1s electrons into some Rydberg orbitals induces Auger shake-down transitions, because higher-lying Rydberg orbitals in the two Si atoms closely positioned hold spatially overlapping considerably. A broad TIY peak slightly above the 1s ionization thresholds appreciably yields resonant Auger decays in which a slow photoelectron is re-captured into a higher-lying Rydberg orbital. The normal Auger peak shape at this photon energy is distorted due to a post-collision interaction effect. These findings provide a clear understanding on properties of the excited orbitals which are ambiguous in the measurement of the TIY only.
- OSTI ID:
- 22251520
- Journal Information:
- Journal of Chemical Physics, Vol. 139, Issue 17; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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