Theoretical Studies of Interstellar Processes

During the current reporting period we have continued our studies of the dissociative recombination (DR) of HeH(+) with an electron with the goal of calculating accurate cross sections and rate coefficients to allow for the accurate modelling of the abundance of HeH(+) in planetary nebulae and supernova envelopes. We have also started studies of the DR of H3(+), a process of great importance in the interstellar medium.