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Fragmentation of neutral Cn clusters (n ≤ 9): experimental and theoretical investigations

  • G. Martinet
  • M. Chabot
  • K. Wohrer
  • S. Della Negra
  • D. Gardès
  • J. A. Scarpaci
  • P. Désesquelles
  • V. Lima
  • S. Díaz-Tendero
  • M. Alcamí
  • P.-A. Hervieux
  • M. F. Politis
  • J. Hanssen
  • F. Martín

Abstract.

We report on experimental and theoretical efforts designed to understand the fragmentation of small carbon clusters. Experimentally, a new detection system for high velocity fragments has been recently developed allowing the fragmentation of high velocity clusters to be totally recorded [1]. Results for the branching ratios of deexcitation of C5 and C9 formed by electron capture in high velocity \( {\rm{C}}_5^ + ,\;{\rm{C}}_9^ + + {\rm{He}} \)collisions are presented. Theoretically, the dissociation dynamics of C5 has been investigated using a kinematical model based on the statistical theory of Weisskopf. In this model various structural quantities (geometries, dissociation energies, harmonic frequencies), are required for both the parent cluster and the fragments. They have been calculated within DFT and coupled-cluster formalisms for Cn up to n = 9. In all cases, a strong correlation between measured branching ratios and calculated dissociation energies is observed.

PACS.

36.40.Qv Stability and fragmentation of clusters 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2003

Authors and Affiliations

  • G. Martinet
    • 1
  • M. Chabot
    • 1
  • K. Wohrer
    • 2
  • S. Della Negra
    • 1
  • D. Gardès
    • 1
  • J. A. Scarpaci
    • 1
  • P. Désesquelles
    • 1
  • V. Lima
    • 1
  • S. Díaz-Tendero
    • 3
  • M. Alcamí
    • 3
  • P.-A. Hervieux
    • 4
  • M. F. Politis
    • 2
  • J. Hanssen
    • 4
  • F. Martín
    • 3
  1. 1.Institut de Physique Nucléaire Université Paris-SudOrsay CedexFrance
  2. 2.GPS Université,CNRS UMR 75088, Paris 6Paris Cedex 05 France
  3. 3.Departamento de Química C-IX Universidad Autónoma de MadridMadridSpain
  4. 4.LPMC Institut de Physique, Technopôle 2000MetzFrance

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