Phys. Rev. A 78, 043201 (2008) [9 pages]Kinetic-energy-release distributions and barrier heights for C2+ emission from multiply charged C60 and C70 fullerenesReceived 24 July 2008; published 31 October 2008 We present experimental kinetic-energy-release distributions in the asymmetric fission processes C60q+→C58(q−1)++C2+ and C70q+→C68(q−1)++C2+ for highly excited mother ions in charge states q=4–8. We find that the distributions for C70q+ are considerably narrower and peak at lower energies than for C60q+ in the corresponding charge state when q>4. Further, semiempirical values for C2+ fission barrier heights were extracted for q=4–6 by means of a statistical approach and the measured intensity ratios between fission and C2 evaporation. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.78.043201
DOI:
10.1103/PhysRevA.78.043201
PACS:
36.40.Qv, 34.70.+e
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