Bonn 2025 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 2: Precision Spectroscopy of Atoms and Ions I (joint session A/Q)
A 2.7: Vortrag
Montag, 10. März 2025, 12:45–13:00, HS PC
High-precision ground-state hyperfine spectroscopy on a trapped 9Be ion — •Annabelle Kaiser1, Stefan Dickopf1, Bastian Sikora1, Marius Müller1, Anton Gramberg1, Ankush Kauschik1, Philipp Justus1, Stefan Ulmer2,3, Zoltan Harman1, Vladimir Yerokhin1, Christoph Keitel1, Andreas Mooser1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Heinrich-Heine Universität Düsseldorf, Germany — 3RIKEN, Wako, Japan
Measurements of the Zeeman splitting in systems with nuclear magnetic moments can be used to infer the shielded nuclear and the bound electron g-factors, as well as the zero-field hyperfine splitting [1]. We measured the Zeeman splitting of 9Be3+ and compare it to measurements on 9Be1+ [2] to test the theory of the diamagnetic shielding factor [3] on the parts per billion level. Additionally, we compare our measured zero-field splitting with the value obtained in 9Be1+ via the so-called hyperfine specific difference to cancel theoretically intractable nuclear structure contributions. The measurement results as well as future plans will be presented [4].
[1] A. Schneider et al, Nature 606, 878-883 (2022)
[2] D. J. Wineland et al, Phys. Rev. Lett. 50, 628-631 (1983)
[3] K. Pachucki and M. Puchalski, Opt. Commun. 283, 641-643 (2010)
[4] S. Dickopf et al, Nature 632, 757-761 (2024)
Keywords: hyperfine structure; Zeeman level spectroscopy; trapped ions; Penning trap