Abstract
Near thermal energy collisions of sodium clusters with O 2, Cl 2 and C 60 are shown to lead to the production of large amounts of molecular ions. In the case of C 60, charge separation to form Na x + and C 60 − is facilitated by the collision kinetic energy. In contrast, in a process driven by the reaction exoergicity of dissociative chemisorption, O 2 and Cl 2 collisions can give rise to electron emission to yield Na x X 2 +. Both collision outcomes bear analogies to charging phenomena previously observed at bulk surfaces and to reactions of alkali atoms and dimers in the gas phase.
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