Reactions of H2 with He+ at temperatures below 40 K

Abstract

We have measured the rate coefficients for radiative (RCT) and dissociative (DCT) charge transfer from He+ to H2 at temperatures 15≲T≲40 K. We find the radiative charge transfer reaction to be essentially independent of temperature, while the rate coefficient for the dissociative reaction increases with increasing temperature in this temperature range. We compare our results with those of other experimenters and comment on sources of uncertainty unique to this experiment.