Abstract

High-resolution Rydberg-state spectroscopy was applied to investigate high-lying Rydberg states of the alkaline-earth elements Mg, Ca, Sr, and Ba up to principal quantum numbers n > 200. In this energy range interactions dominate that are negligible at low n. It is shown that the hyperfine interaction can be used as a sensitive probe for configuration interactions, singlet–triplet mixing, and hyperfine-induced n mixing.

© 1988 Optical Society of America

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