Theoretical study with spin-orbit effects and electronic transition moment calculation of the ion NaCs+

A theoretical study was done of the electronic structure of the molecular ion NaCs+. The calculation is based on nonempirical pseudopotentials and parameterized [Formula: see text]-dependent polarization potential. Gaussian basis sets were used for both atoms and spin-orbit effects were taken into account. Potential energy curves were obtained for 56 lowest electronic states for the symmetries 2∑+, 2Π, 2Δ, and Ω of the molecular ion NaCs+. The spectroscopic constants were calculated for 19 electronic states by fitting the calculated energy values to polynomials in terms of the internuclear distance r. Through the canonical functions approach the eigenvalue Ev, the rotational constant Bv and the abscissas of the turning points were calculated up to 52 vibrational levels for 6 bound states. The dipole moment were calculated in the considered range of the internuclear distance r. The comparison of the calculated values to those available in the literature shows a good agreement. PACS Nos.: 31.10.+z, 31.15.Ar, 31.50.Df, 33.15.Mt