Erlangen 2022 – scientific programme
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A: Fachverband Atomphysik
A 3: Precision spectroscopy of atoms and ions I (joint session A/Q)
A 3.5: Talk
Monday, March 14, 2022, 15:00–15:15, A-H2
Hyperfine Spectroscopy of Single Molecular Hydrogen Ions in a Penning Trap at Alphatrap — •C. M. König1, F. Heiße1, J. Morgner1, T. Sailer1, B. Tu1,2, K. Blaum1, S. Schiller3, and S. Sturm1 — 1Max-Planck-Institut für Kernphysik, 69117 Heidelberg — 2Institute of Modern Physics, Fudan University, Shanghai 200433 — 3Institut für Experimentalphysik, Univ. Düsseldorf, 40225 Düsseldorf
As the simplest molecules, molecular hydrogen ions (MHI) are an excellent system for testing QED. We plan to perform high-precision spectroscopy on single MHI in the Penning-trap setup of Alphatrap [1], initially focusing on the hyperfine structure of HD+. This will allow extracting the bound g factors of the constituent particles and coefficients of the hyperfine hamiltonian. The latter can be compared with high-precision ab initio theory [2] and are important for a better understanding of rovibrational spectroscopy performed on this ion.
In the future, we aim to extend our methods to single-ion rovibrational laser spectroscopy of H2+ enabling the ultra precise determination of fundamental constants, such as mp/me [3]. The development of the required techniques will be an important step towards spectroscopy of an antimatter H2− ion [4]. In this contribution, I will present an overview of the experimental setup and first measurement results of the hyperfine structure of HD+.
[1] S. Sturm et al., Eur. Phys. J. Spec. Top. 227, 1425-1491 (2019)
[2] J.-Ph. Karr, et al. Phys. Rev. A 102, 052827 (2020)
[3] J.-Ph. Karr, et al., Phys. Rev. A 94, 050501(R) (2016)
[4] E. Myers, Phys. Rev. A 98, 010101(R) (2018)