Oscillator strengths for Rydberg states in ArH calculated in QDT approximation

With the help of a simple semi-analytical procedure the oscillator strengths for Rydberg electronic transitions in the ArH molecule are calculated by accounting for the effects of non-spherical symmetry of the molecular core’s field due to its dipole moment. Such effects result in non-zero oscillator strength values for some transitions which are forbidden in the widely used atom-like model of molecular Rydberg states. For the allowed transitions we also report the difference between the atom-like calculations and the calculations which take into account the dipole moment of the molecular core.