Quasirelativistic potential energy curves and transition dipole moments of NaRb

We report on extensive calculations of quasi-relativistic potential energy curves and, for the first time, transition dipole moments including spin-orbit and scalar-relativistic effects of the NaRb molecule. The calculated curves of the 0+, 0-, 1, 2 and 3 molecular states correlate for large internuclear separation with the fourteen lowest atomic energies up to the Na(3s2S1/2) + Rb(7s2S1/2) atomic limit. Several new features of the potential energy curves have been found.