Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 33: Poster Session II
A 33.33: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal
Towards High Precision Spectroscopy of µLi and µBe — •Marcel Willig, Jan Haack, Julian Krauth, Stefan Schmidt, and Randolf Pohl — Johannes Gutenberg-Universität Mainz, QUANTUM, Institut für Physik & Exzellenzcluster PRISMA, Mainz, Germany
Laser spectroscopy of muonic atoms proved to be a useful tool for measuring the rms charge radii of the lightest nuclei. The values gained with this method are orders of magnitude more precise than by electron scattering alone. This increased precision gave rise to the proton radius puzzle, a 5.6σ difference between the rms charge radius of muonic hydrogen and the respective CODATA value [1].
Further measurements have been performed on Deuterium [2], 3He and 4He. The next logical steps are muonic Li and Be. Spectroscopy of these atoms will improve the radii by an order of magnitude, only limited by the current accuracy of the calculated nuclear polarizability.
We summarize the results on H, D, He and present our ideas towards high precision spectroscopy of µLi and µBe. In addition we have performed a first study of the feasibility of stopping muons in a large Be ion crystal, which will also be presented.
[1] R. Pohl et al., Nature 466.7303, 213-216 (2010)
[2] R. Pohl et al., Science 353.6300, 669-673 (2016)