Polarizabilities of Rn-like Th4+ from rf spectroscopy of Th3+ Rydberg levels

J. A. Keele, S. R. Lundeen, C. W. Fehrenbach

High resolution studies of the fine structure pattern in high-L n=37 levels of Th3+ have been carried out using radio-frequency (rf) spectroscopy detected with Resonant Excitation…