Abstract
Dissociative charge exchange reactions between Ar+ ion and trans- /cis- dichloroethylene (trans-/cis-C2H2Cl2) are investigated with the ion-velocity imaging technique. The dechlorinated product C2H2Cl+ is the predominant, and most of this product show the spatial distribution around the target, implying that the dissociation occurs in the large impact-parameter collision and via the energy resonant charge transfer. Meanwhile, a few C2H2Cl+ locate around the center-of-mass, which is attributed to the fragmentation of intimate association between C2H2Cl2 and Ar+ or in the small impact-parameter collision. The product C2HCl+ exhibits the velocity distribution features similar to those of C2H2Cl+. The rarest product C2HCl2+ shows the distributions around the molecular target, due to the quick dehydrogenation after the energy-resonant charge transfer in the large impact-parameter collision.
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