Oscillator Strengths for the Alkaline-Earth Atoms Using Rotor-Vibrator and Configuration-Interaction Wave Functions

We have calculated oscillator strengths for transitions between low-lying states of the alkaline-earth atoms using both configuration-interaction (CI) and simple optimized molecular rotor-vibrator (RV) wave functions for the e-core-e system. Our CI results compare favorably with experimental and other accurate values, indicating that these functions used in previous studies of electron correlation are reliably accurate. Most RV results agree better with accurate values than do Hartree-Fock results, thus showing the success of the RV model in its first test of calculating an experimental observable.