Conversion formulas between radiative lifetimes and other dynamical variables for spin-allowed electronic transitions in diatomic molecules

On the basis of recently recommended conventions for defining electronic transition moments and Hoenl-London factors for diatomic molecules by Whiting et al., explicit expressions relating the radiative lifetimes of rovibronic as well as vibronic states to the electronic transition moment and the absorption oscillator strength for spin-allowed transitions are given. The relationship between transition probability, oscillator strength, and electronic transition moment for rotational lines and integrated vibrational bands are tabulated. The most common alternative formulas for relating transition probability and oscillator strength to electronic transition moment for vibrational bands that occur in the literature are examined. The relationship between the electronic transition moments involved in each particular formula and the electronic transition moment defined by Whiting et al. are given for all possible spin-allowed transitions.