Rydberg spectroscopy of Fr-like thorium and uranium ions
The binding energies of high L Rydberg levels of Th3+ were measured using the resonant excitation Stark ionization spectroscopy (RESIS) technique. When analyzed using the long range polarization model the measured energies determine the dipole and quadrupole polarizability of the Th4+ ion: αd = 7.61(6) a.u. and αQ = 45(4) a.u. The RESIS technique and apparatus constructed for this study are discussed in this work. Modifications to the original design of the detector are presented. The modifications to the detector increased the energy resolution of the beams in the detector. It was determined ...
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Hanni, Mark Earl
Lundeen, Stephen R.