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VIBRATIONALLY RESOLVED PHOTOELECTRON SPECTRA OF ANNEALED${\rm C}_n^-$AND${\rm Si}_n^-$CLUSTERS

Author

Listed:
  • G. SCHULZE ICKING-KONERT

    (Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany)

  • H. HANDSCHUH

    (Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany)

  • P.S. BECHTHOLD

    (Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany)

  • G. GANTEFÖR

    (Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany)

  • B. KESSLER

    (Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany)

  • W. EBERHARDT

    (Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, D-52425 Jülich, Germany)

Abstract

Photoelectron spectra of annealed carbon-cluster anions${\rm C}_n^-$n=5–70, are presented which show vibrational fine structure. From the vibrational frequencies, theoretical results, and ion mobility measurements, the geometry of the clusters can be determined: clusters withn=5, 7, and 9 are linear chains;n=10, 12, 14, 16, and 18 build monocyclic rings; forn=20, 24, and 28 the vibrational features correspond best to bicyclic rings; and for evenn>30fullerenes are found. In contrast to carbon, the mass distribution of silicon-cluster anions (up ton≈30) does not change dramatically upon annealing. An enhanced abundance of typical fragmentation products${\rm Si}_n^-$withn=4, 6, 7, and 10 is found. The vibrational fine structure for${\rm Si}_7^-$agrees with that of a pentagonal bipyramid.

Suggested Citation

  • G. Schulze Icking-Konert & H. Handschuh & P.S. Bechthold & G. Ganteför & B. Kessler & W. Eberhardt, 1996. "VIBRATIONALLY RESOLVED PHOTOELECTRON SPECTRA OF ANNEALED${\rm C}_n^-$AND${\rm Si}_n^-$CLUSTERS," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(01), pages 483-487.
    • Handle: RePEc:wsi:srlxxx:v:03:y:1996:i:01:n:s0218625x96000875
    DOI: 10.1142/S0218625X96000875
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