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Charge-State Dependence of C60 – Multifragmentation in Collisions of 30 MeV Ne2–9+ Ions

An experimental study has been made on multifragmentation of free C60 molecules using highly charged neon ions at an incident energy of 30 MeV. Production cross sections for fragment ions were obtained systematically at projectile charge states q = 2 ∼ 9 using time-of-flight coincidence method. Total cross sections for all product ions are found to increase approximately as q1.2. On the other hand, cross sections for individual ions exhibit significantly different q-dependence for different ions. As an overall feature, most product ions begin to increase slowly at low q values and then sharply as q2 for q ≥ 7. Production of C1+ ions is found to be enhanced exhibiting a q2.7 dependence for q ≥ 7.