Strong velocity effects in collisions of He+ with fullerenes

T.A. Schlathölter, O. Hadjar, R.A. Hoekstra, R.W.H. Morgenstern

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Abstract

We have studied fragmentation and ionization of C-60 by He+ impact over a velocity range from 0.1 to 1 a.u. where a transition from vibrational to electronic excitation is predicted. With increasing velocity we observe a strong decrease of evaporative processes (C-60-2m(r+) peaks) and a linearly increasing yield of small fragments (C-n(+), n <15). Apparently direct vibrational excitation leads preferentially to evaporation, whereas electronic excitation is responsible for multifragmentation. In the intermediate range we find indications for a "transparency window" similar to that predicted recently in simulations of Na-9(+)-He collisions. [S0031-9007(98)08105-8].

Original languageEnglish
Pages (from-to)73-76
Number of pages4
JournalPhysical Review Letters
Volume82
Issue number1
Publication statusPublished - 4-Jan-1999

Keywords

  • CHARGED IONS
  • HIGH-ENERGY
  • C-60
  • FRAGMENTATION
  • IONIZATION
  • ATOMS
  • PATTERNS
  • DYNAMICS
  • IMPACT
  • GAS

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