Low Energy Ion-Neutral Reactions. VI. Ar⁺+Ar, N₂⁺+N₂, O₂⁺+O₂ and CO⁺+CO.

Symmetric resonance charge transfer reactions, between atomic ion and atom; Ar + +Ar, and between molecular ion and molecule; N 2 + +N 2 , O 2 + +O 2 and CO + +CO, were studied by the injected-ion drift tube technique from 0.04 eV to 3 eV in the center of mass system. The experimental cross section for the reaction in Ar + +Ar agrees well with the theoretical one of Rapp and Francis. The experimental results for molecular charge transfer are compared with Rapp and Francis theory taking into account of the Franck-Condon factor.