Ab initio potential energy curves and transition dipole moments for the interaction of a ground state He with Na(3s-3p)

Potential energy curves of the states X 2Σ+, B (1)2Σ+ and A (1)2Π of the NaHe molecule have been calculated accurately in a large range of internuclear distances R from SA-CASSCF-MRCI calculations, using molecular orbitals expanded in cc-pV5Z basis sets. Transition dipole moments have also been calculated for the X-B, X-A and A-B transitions, in the same range of R. Their long-range behaviour have been considered.