Kinetic energy release of F- desorption from condensed CF4 following low energy electron impact

Y. Le Coat*, Mohamed Nejib Hedhili, R. Azria, M. Tronc, F. Weik, E. Illenberger

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    4 Scopus citations

    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 languageEnglish (US)
    Pages (from-to)231-239
    Number of pages9
    JournalInternational Journal of Mass Spectrometry and Ion Processes
    Volume164
    Issue number3
    StatePublished - Dec 1 1997

    Keywords

    • CF
    • Gas phase/condensed phase
    • Kinetic energy release
    • Negative ion resonances

    ASJC Scopus subject areas

    • Spectroscopy

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