Abstract
The kinetic energy release of desorbed F- ions formed via dissociative electron attachment (DA) to condensed CF4 is measured by means of an electrostatic energy analyzer. The condensed phase results are compared to DA from gas phase CF4 where F- appears with high kinetic energy from a feature at 6.2 eV (assigned as CF4- (2T2) shape resonance) and with low kinetic energy from a second feature located at 7.7 eV (assigned as a Feshbach type CF4*- resonance with T1 symmetry). In contrast, the kinetic energy of desorbed F- continuously increases with electron energy over the entire range of the resonance feature (5-9 eV) with a slope of 0.25 for the most probable energy of F-. The present results indicate that the transfer of electronic energy into nuclear motion is considerably modified in the condensed phase.
Original language | English (US) |
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Pages (from-to) | 231-239 |
Number of pages | 9 |
Journal | International Journal of Mass Spectrometry and Ion Processes |
Volume | 164 |
Issue number | 3 |
DOIs | |
State | Published - 1997 |
Externally published | Yes |
Keywords
- CF
- Gas phase/condensed phase
- Kinetic energy release
- Negative ion resonances
ASJC Scopus subject areas
- Spectroscopy