Fragmentation mechanism of highly excited C70 cations in the extreme ultraviolet

Koichiro Mitsuke, Hideki Katayanagi, Junkei Kou, Takanori Mori, Yoshihiro Kubozono

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    6 Citations (Scopus)

    Abstract

    The ion yield curves for C70-2n z+ (n = 1-8, z = 2 and 3) produced by photoionization of C70 were measured in the photon energy (hν) range of 25 - 150 eV. The appearance hv values were higher by ca. 34 eV than the thermochemical thresholds for dissociative ionization of C70 leading to C70-2nz+. Evaluation was made on the upper limits of the internal energies of the primary C70 z+ above which C70-2n+2 z+ fragments cannot escape from further dissociating into C70- 2n z++C 2. These critical internal energies agreed well with appearance internal energies of C70 z+ theoretically obtained corresponding to the threshold for the formation of C70-2n z+. The photofragmentation of the parent C70 z+ ions is considered to be governed by the mechanism of internal conversion of their electronically excited states, statistical redistribution of the excess energy among a number of vibrational modes, and sequential ejection of the C2 units.

    Original languageEnglish
    Title of host publicationProceedings of the International Symposium on (e,2e), Double Photoionization and Related Topics and the 13th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions
    Pages161-166
    Number of pages6
    DOIs
    Publication statusPublished - 2006
    EventInternational Symposium on (e,2e), Double Photoionization and Related Topics and the 13th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions - Buenos Aires, Argentina
    Duration: Jul 28 2005Jul 30 2005

    Publication series

    NameAIP Conference Proceedings
    Volume811
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Other

    OtherInternational Symposium on (e,2e), Double Photoionization and Related Topics and the 13th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions
    Country/TerritoryArgentina
    CityBuenos Aires
    Period7/28/057/30/05

    Keywords

    • Binding energies
    • C
    • Fullerene ions
    • Photofragmentation
    • Reaction rate

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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