Theoretical electronic structure of RbCs revisited

The potential energy for the 30 lowest molecular states (2S+1)Lambda((+)) o f the RbCs molecule has been calculated over a wide range of internuclear d istances, using an ab initio method based on non-empirical pseudopotentials , parametrized l-dependent polarization potentials and full valence CI calc ulations. Molecular spectroscopic constants have been derived for the bound states. An accurate description of the few experimentally known states is obtained. Extensive tables of energy values versus internuclear distances a re available at the following address: http://lasim.univlyon 1.fr/allouche/ rbcs.htm.