In a recent study on Oq+ (1 less than or equal to q less than or equal to 7
) collisions with C-60, We presented fragmentation patterns dominated by el
ectron capture processes. We now investigate the remaining important intera
ction mechanisms: electronic excitation due to ion-electron interactions an
d vibrational excitation due to ion-nucleus interactions as well as the pos
sible electronic-vibrational coupling. Using Heq+ (q = 1, 2) projectiles we
observed a decrease of evaporation peaks (ascribed to vibrational excitati
on) with increasing collision energy (2 keV * q less than or equal to E-kin
less than or equal to 100 keV * q) and an increase of small fragments C-n(
+) as well as parent ions C-60(q+) (attributed to electronic excitation). T
he additional potential energy carried by He2+ (with respect to He+) was fo
und to cause an extra fragmentation and ionization respectively in the low
and high projectile energy regimes.