Electrostatic model calculations of fission barriers for fullerene ions

  • H. Zettergren
  • J. Jensen
  • H. T. Schmidt
  • H. Cederquist
Article

Abstract.

We present model calculations of kinetic energy releases and fission barriers in asymmetric fission of C60 r + ions, using a simple electrostatic model where the fragments are treated as conducting spheres. The kinetic energy releases are calculated using two different approaches for deducing the radii of the spheres. Both approaches give results in qualitative agreement with experimental results. The fission barriers, on the other hand, depend strongly on the model radii and the activation energies for neutral fragment emission. A comparison between the model calculations shows that the choice of the finite size of the smaller fragments become important as r increases and have large influences on the prediction for the C60 r + stability limit. The competition between neutral (evaporation) and charged-fragment emission (fission) are discussed within a static over-the-barrier model for electron transfer between conducting spheres.

Keywords

Evaporation Activation Energy Electron Transfer Fullerene Model Calculation 

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  • H. Zettergren
    • 1
  • J. Jensen
    • 1
  • H. T. Schmidt
    • 1
  • H. Cederquist
    • 1
  1. 1.Physics DepartmentStockholm UniversityStockholmSweden

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