Laser cooling and electronic structure studies of BaI molecule

Literature shows a lack of laser cooling studies of Barium Monohalide (BaI) diatomic molecules. In this work, we present a series of calculations using the ab initio complete active space self-consistent field (CASSCF)/MRCI approach with Davidson correction to fill out this gap. The adiabatic potential energy curves, the static dipole moment curves, and the spectroscopic parameters have been investigated for the bound low-lying electronic states. The ro-vibrational constants E_v, B_v, D_v, and the turning points R_min and R_max were also examined for the surveyed electronic states. The calculation of the transition dipole moment curves for the X²Σ⁺- (1)²Π transition, the Franck-Condon factor, the radiative lifetime, the branching ratio, the laser cooling scheme, and the buffer gas study prove that the molecule BaI is a good candidate for a Doppler laser cooling experiment.