Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 33: Poster Session II

A 33.17: Poster

Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal

On the status of experiments with hydrogen-like ions at the Heidelberg electron beam ion trap — •Hendrik Bekker and José R. Crespo López-Urrutia — Max-Planck-Insitüt für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

The strong enhancement of bound-state quantum-electrodynamic (QED) and relativistic effects combined with the relatively simple structure of heavy hydrogen-like ions make them highly suitable for studies of fundamental physics. For example, the value of fundamental constants can be extracted from g-factor measurements [1]. Also, the ground-state hyperfine splitting (HFS) can be within laser range, allowing for precision spectroscopic studies of variation of fundamental constants [2]. By also investigating the HFS in Li-like systems, QED can be tested in the strongest electric field available at present for experimental study [3]. At the Heidelberg electron beam ion trap (HD-EBIT), preparations for high energy operation are underway. Planned measurements include investigations of the HFS of Pr⁵⁸⁺. Furthermore, the HD-EBIT will function as an ion source for the Penning trap experiments PENTATRAP and ALPHATRAP.

[1] S. Sturm, et al. "High-precision measurement of the atomic mass of the electron." Nature 506.7489 (2014): 467-470

[2] S. Schiller, "Hydrogenlike HCI for tests of the time independence of fundamental constants." Phys. Rev. Lett. 98, 180801 (2007)

[3] V. M. Shabaev, et al. "Towards a test of QED in investigations of the hyperfine splitting in heavy ions." Phys. Rev. Lett. 86, 3959 (2001)