Perturbations in the np1,3P Rydberg sequences of neutral Yb probed by Zeeman-effect and lifetime measurements

The np P Rydberg sequence of neutral Ytterbium is strongly perturbed. These perturbations were monitored by measuring the gJ factors and lifetimes of 19 states, including both singlets and triplets as well as states from the perturbing configurations. A pulsed laser setup was used. The gJ factors were obtained from a Zeeman quantum-beat experiment and the lifetimes by direct observation of the decay of the fluorescence light. (orig.)