CHARGE-TRANSFER IN COLLISIONS INVOLVING MULTIPLY-CHARGED C-60 MOLECULES

Electron capture in collisions of C-60(2+) and C-60(3+) molecular ions with atomic and molecular gases has been studied at impact energies a round 100 keV. The cross-section dependence on the target-ionization p otentials is discussed, and a simple over-barrier model is evoked to e xplain the energy dependences. The cross sections for endothermic proc esses are discussed in the light of a simple two-state model, and a ge neral understanding of their behaviour is obtained.