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.
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 2005 Oct 1|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics