TOWARDS A THEORY OF DISSOCIATIVE RECOMBINATION

Current experiments in storage rings at Aarhus and Stockholm reveal th at ions such as CH3+, OH3+, OH2+ and CH5+ recombine and fragment into three parts more often than into just two. Analysis of the possible re sonances between free electron and bound electron states for the ions require a detailed examination of the correlation effects as well as t he coupling to nuclear degrees of freedom. The problem is well suited for the propagator approach. An analysis of the structure of the self- energy kernel shows the presence of possible resonances with degenerat e electronic states which are unstable according to the Jahn-Teller th eorem and provides channels for multiple fragmentation.