Hanni, M. E.Keele, Julie A.Lundeen, S. R.Fehrenbach, C. W.2023-12-072023-12-072010-08-25https://hdl.handle.net/2097/43813Binding energies of high-L Rydberg levels of Th3+ were measured using the resonant excitation Stark ionization spectroscopy technique. Analysis of the data with the long-range polarization model leads to determination of dipole and quadrupole polarizabilities of the free Th4+ ion, αd = 7.61(6) a.u., αQ = 47(11) a.u.© American Physical Society (APS). This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).http://rightsstatements.org/vocab/InC/1.0/https://web.archive.org/web/20181120135245/https://journals.aps.org/copyrightFAQ.htmlText