Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session H05: Precision Spectroscopy - Experiment and Theory
8:00 AM–10:00 AM,
Wednesday, June 7, 2023
Room: 205
Chair: Nicholas Hutzler, California Institute of Technology
Abstract: H05.00004 : Calculation of energies and hyperfine structure constants of $^{233}$U$^{+}$ and $^{233}$U*
8:36 AM–8:48 AM
Presenter:
Sergey G Porsev
(University of Delaware)
Authors:
Sergey G Porsev
(University of Delaware)
Charles Cheung
(University of Delaware)
Marianna Safronova
(U Delaware)
We carried out calculations of the energies and magnetic dipole hyperfine-structure constants of the low-lying states of $^{233}$U$^{+}$ and $^{233}$U using two different approaches. The first approach combines configuration interaction (CI) with a method allowing us to include core-valence correlations to all orders of the perturbation theory over residual Coulomb interaction. The second approach is a pure CI method which allows the use of different initial approximations. We present a detailed analysis of all calculated properties and discuss the advantages and disadvantages of each of these methods. We report a preliminary value of the U nuclear magnetic moment and outline the need for further experiments.
*This work is a part of the ``Thorium Nuclear Clock'' project that has received funding from the European Research Council under the European Union's Horizon 2020 research and innovation program (Grant No. 856415). This work was supported in part by NSF Grant No.~PHY-2012068.
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