Site-selective ion production of the core-excited CH{sub 3}F molecule probed by Auger-electron-ion coincidence measurements
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan)
- Department of Physics Science, University of Oulu, Oulu (Finland)
- Atomic Physics Laboratory, RIKEN, Wako, Saitama 351-0198 (Japan)
- Department of Physics, Sophia University, Tokyo 102-8554 (Japan)
- Department of Chemistry, Hiroshima University, Higashi-Hiroshima (Japan)
- Japan Synchrotron Radiation Research Institute, Sayo-gun, Hyogo (Japan)
We have carried out a coincidence experiment between energy-resolved resonant Auger electrons and mass-resolved ions on CH{sub 3}F molecules following F 1s and C 1s excitation to the lowest unoccupied C-F antibonding molecular orbital {sigma}{sub CF}{sup .} We found a strong enhancement of the F{sup +} or CH{sup +} ion production in coincidence with the F KVV and C KVV spectator Auger electrons, respectively, in the wide binding energy range of 28-36 eV. This site-selective ion production is interpreted as a consequence of the resonant Auger emission taking place in the transient region where the C-F elongation caused by the core excitation transforms the molecular valence orbitals gradually into nonoverlapping valence orbitals of each fragment.
- OSTI ID:
- 20718740
- Journal Information:
- Physical Review. A, Vol. 72, Issue 4; Other Information: DOI: 10.1103/PhysRevA.72.042704; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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