Electronic transition dipole moment and radiative lifetime calculations of sodium dimer ion-pair states.

We report here ab initio calculated electronic transition dipole moments for the sodium dimer ion pair states of ¹Σg+ g symmetry. They vary strongly as a function of internuclear distance because of the effect of the Na+ + Na- ion pair potential, which also causes the formation of additional wells and shoulders in the molecular potential energy curves. We also present a computational study of the transition dipole moment matrix elements and lifetimes for these ion-pair states. [ABSTRACT FROM AUTHOR]