Site-selective ion production of the core-excited CH3F molecule probed by Auger-electron-ion coincidence measurements

X. J. Liu, G. Prümper, E. Kukk, R. Sankari, M. Hoshino, C. Makochekanwa, M. Kitajima, H. Tanaka, H. Yoshida, Y. Tamenori, Kiyoshi Ueda

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41 Citations (Scopus)

Abstract

We have carried out a coincidence experiment between energy-resolved resonant Auger electrons and mass-resolved ions on CH3F molecules following F 1s and C 1s excitation to the lowest unoccupied C-F antibonding molecular orbital σCF*. We found a strong enhancement of the F+ or CH+ 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.

Original languageEnglish
Article number042704
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume72
Issue number4
DOIs
Publication statusPublished - 2005 Oct 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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