Charge Transfer in Collisions of C⁺with H and H⁺with C

Abstract

Charge transfer rate coefficients for collisions of C`with H and H`with C are presented for temperatures from 30,000 to 107 K and from 10 to 107 K, respectively. The rate coefficients were calculated from recommended cross sections deduced in a recent theoretical and experimental investigation that took into account previous measurements. Nonadiabatic radial coupling is the dominant mechanism for both reactions above D50,000 K, but for lower temperatures the reaction of H`with C proceeds primarily by radiative charge transfer. Implications, due to the magnitude of the rate coefficients, for various astrophysical environments are discussed.