SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 12: Precision Spectroscopy of Atoms and Ions I (joint session A/Q)
Q 12.2: Vortrag
Montag, 6. März 2023, 17:30–17:45, F107
High-precision hyperfine structure measurement of 9Be3+ for tests of nuclear shielding theory — •Stefan Dickopf, Annabelle Kaiser, Marius Müller, Bastian Sikora, Zoltan Harman, Christoph Keitel, Stefan Ulmer, Andreas Mooser, and Klaus Blaum — Max-Planck Institute for Nuclear Physics, Heidelberg, Germany
Hyperfine structure (HFS) measurements on 3He1+ in our Penning-trap setup have recently been used to determine the magnetic moment of its nucleus [1]. To use this value for high accuracy magnetic field measurements with 3He-NMR-probes it has to be corrected for by a diamagnetic shielding due to the orbiting electrons. By measuring the HFS of 9Be3+ and comparing it to measurements on 9Be1+ we can test the theory of the diamagnetic shielding factor [2,3].
A determination of the g-factor of the nucleus with a precision of about 10−9 is planned, making a test of the diamagnetic shielding on the same level possible. Recent improvements to our setup and a high precision mass measurement carried out at the PENTATRAP experiment will further allow us to determine the bound electron g-factor of 9Be3+ to a few parts in 10−11, yielding an additional high-precision test of QED g-factor calculations [1].
[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)