Abstract
New absolute cross sections for ionization, capture and fragmentation of the C60 molecule in collisions with 2 to 130 keV Hn+ (n = 1-3) hydrogen ions are presented together with the first electron spectroscopy of the C60 molecule colliding with protons. A comparison with available C60r+ production cross sections indicate a good agreement for charges r higher than unity; a discrepancy of a factor of two between C60+ cross sections is discussed. A CTMC calculation reproduces our measurements for r = 1 and 2 at 100 keV. An unusual electron energy distribution is measured which peaks generally above 10 eV, with a negligible contribution of very low energy electrons; these results are understood as a trapping of low energy electrons behind the centrifugal barrier. From these electron spectra, the averaged kinetic energy of the emitted electron is determined in the 20 to 120 keV energy range and, using the calculated mean energy deposit, the mean internal energy of the molecule is deduced comparing well with other experimental data.
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