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Nörtershäuser, W.; Ullmann, J.; Skripnikov, L. V.; Andelkovic, Z.; Brandau, C.; Dax, A.; Geithner, W.; Geppert, C.; Gorges, C.; Hammen, M.; Hannen, V.; Kaufmann, S.; König, K.; Kraus, F.; Kresse, B.; Litvinov, Y. A.; Lochmann, M.; Maaß, B.; Meisner, J.; Murböck, T.; Privalov, A. F.; Sánchez, R.; Scheibe, B.; Schmidt, M.; Schmidt, S.; Shabaev, V. M.; Steck, M.; Stöhlker, T.; Thompson, R. C.; Trageser, C.; Vogel, M.; Vollbrecht, J.; Volotka, A. V.; Weinheimer, C.
Hyperfine interactions, 2019/12, Letnik: 240, Številka: 1Journal Article
The hyperfine splitting in heavy highly charged ions provide the means to test QED in extremely strong magnetic fields. In order to provide a meaningful test, the splitting has to be measured in H-like and Li-like ions to remove uncertainties from nuclear structure. This has been achieved at the experimental storage ring ESR but a discrepancy to the theoretical prediction of more than 7 σ was observed. We report on these measurements as well as on NMR measurements that were performed to solve this issue.
