Bound-bound and bound-free X2Σg+ → A 2Πu transitions in Na2+ relevant for experiments in above threshold dissociation

A preliminarystudy on above threshold dissociation is presented. The specific example is based on the Na2+ molecular ion, for which accurate potential energy curves and transition dipoles are available. The first step of the process is examined, with a comparison of the bound-bound and bound-free portions of the spectrum.