Abstract

In low energy collisions (10–50 eV) of acetone dimer ions with a stainless steel surface (covered with hydrocarbons) we have been able to observe the occurrence of two different chemical reactions initiated by the surface impact and leading to the protonated acetone ion, namely (1) an intracluster ion–molecule reaction, and (2) a hydrogen pick-up reaction of the cluster ion with the surface material. In accordance with predictions from molecular dynamics simulations, this appears to be the first observation of competitive chemical reactions of a cluster ion driven by energy transfer in a surface collision.

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