Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 11: Precision Spectroscopy of Atoms and Ions I (joint session A/Q)
A 11.3: Talk
Tuesday, March 12, 2024, 11:30–11:45, HS 1098
Precision ground-state hyperfine and Zeeman spectroscopy on 9Be ions — •Stefan Dickopf1, Bastian Sikora1, Annabelle Kaiser1, Marius Müller1, Stefan Ulmer2, Vladimir Yerokhin1, Zoltan Harman1, Christoph Keitel1, Andreas Mooser1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Institut für Experimentalphysik, Heinrich-Heine-Universität, Düsseldorf, Germany
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. Recent progress and the latest results will be presented.
[1] A. Schneider et al, Nature 606, 878-883 (2022)
[2] D. J. Wineland, J. J. Bollinger, and Wayne M. Itano, Phys. Rev. Lett. 50, 628-631 (1983)
[3] K. Pachucki and M. Puchalski, Optics Communication 283, 641-643 (2010)
Keywords: Penning trap; Hyperfine structure