The Influence of Spin-Orbit Coupling on the Efficiency of Optical Transitions in NeAr⁺ Molecular Ion

Using the NeAr⁺ weakly-bound ion as an example, we discuss the dependences of oscillator strengths of electric and magnetic dipole transitions in the weakly-bound heteronuclear rare gas ions on the spin-orbit coupling. We show that even when the spin-orbit coupling magnitude is small, its role in the optical transitions in the weakly-bound systems is not limited to line splitting. The correlation between the typical magnitude of the spin-orbit coupling energy, the splitting of the unperturbed terms and the change in the oscillator strengths of the electric and magnetic dipole transitions is demonstrated.