Reactions of molecular dications: collision energy dependence of integral cross-sections of processes in CHCl 2+ + Ar, D 2 systems from guided beam studies

Abstract

Collision energy dependence of integral cross-sections of charge transfer processes and chemical reactions in the system CHCl 2++Ar and CHCl 2++D 2 was investigated in guided beam experiments. Both singly charged reaction products resulting from non-dissociative charge transfer and chemical reactions in these systems could be identified, in the former system CHCl +, Ar +; CCl +, ArH +, in the latter CHCl +, D 2 +; CHDCl +; CCl +, HD 2 +. The identification of ArH + and HD 2 + helps to specify the reaction of CCl + formation as a proton transfer process from the dication CHCl 2+. The integral cross-section for the charge transfer process with Ar was almost independent of collision energy and its value was close to 2 Å 2; the cross-sections for the chemical reaction of CCl + formation with Ar was about 6 Å 2 and showed an increase at low collision energy. The integral cross-section of the reactions with D 2 were of the same order of magnitude as those with Ar.