Abstract
New experiments are described, in which laser-based magneto-optical rotation measurements have, for the first time, been extended into the vacuum ultraviolet range of the spectrum. The method is based on synchronizing a pulsed Bitter coil with a coherent VUV four-wave mixing source. Being pulsed, our laser-based Faraday rotation method presents the advantage that a superconducting magnet is not required. The authors have performed accurate measurements of f-values for high Rydberg members of the principal series of Mg I. Above n=21, they observe the emergence of intersystem lines, which signal a breakdown in the LS-coupling conditions. These intersystem lines have not been detected by photoabsorption spectroscopy.
Published Version
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