We have determined absolute charge transfer and fragmentation cross sections in He2++C60 collisions in the impact-energy range 0.1-250 keV by using a combined experimental and theoretical approach. We have found that the cross sections for the formation of He+ and He0 are comparable in magnitude, which cannot be explained by the sole contribution of pure single and double electron capture but also by contribution of transfer-ionization processes that are important even at low impact energies. The results show that multifragmentation is important only at impact energies larger than 40 keV; at lower energies, sequential C2 evaporation is the dominant process.

Fragmentation, ionization and C2 fragment evaporation of the C60 molecule induced by collisions with H+, H2+, H3+ and He+ monocharged ions have been measured in coincidence with the electron emission in the 2-130 keV projectile energy range. The time-of-flight mass spectra were found to vary strongly with the collision energy or velocity and the projectile. On the other hand, they scale rather nicely with the energy deposited in the molecule. Relative weights of the total multi-fragmentation into small Cn+ fragments (n = 1-14), individual multi-fragmentation (n = 1,7 and 11), double ionization of the intact molecule and evaporation of C2 molecules associated with the doubly charged fullerene ion, are used to illustrate our finding quantitatively.