The potential energy for the 30 lowest molecular states 2S+1 (+) of the RbCs molecule has been calculated over a wide range of internuclear distances, using an ab initio method based on non-empirical pseudopotentials, parametrized l-dependent polarization potentials and full valence CI calculations. 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 are available at the following address: http://lasim.univ-lyon1.fr/allouche/rbcs.htm.

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