Electron transfer and multi-ionization in slow collisions of C60 with highly charged ions

In the collisions of 20q keV Arq+ with C60, the relative cross-section for the production of higher charge of C60r+ increases with the initial charge state of the projectiles increasing. By comparing the TOF spectra produced by 56 keV and 160 keV Ar8+ ion impact, respectively, we found that the intensity of the fragments C(60-2n)r+ via evaporation at higher energy was much less.