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A: Fachverband Atomphysik
A 6: Precision Spectroscopy of Atoms and Ions I (joint session A/Q)
A 6.3: Vortrag
Montag, 6. März 2023, 17:45–18:00, F107
Hyperfine Spectroscopy of Single Molecular Hydrogen Ions in a Penning Trap at Alphatrap — •C. M. König1, F. Heiße1, I. V. Kortunov2, J. Morgner1, T. Sailer1, B. Tu1,3, V. Vogt2, K. Blaum1, S. Schiller2, and S. Sturm1 — 1Max-Planck-Institut für Kernphysik, 69117 Heidelberg — 2Institut für Experimentalphysik, Univ. Düsseldorf, 40225 Düsseldorf — 3Institute of Modern Physics, Fudan University, Shanghai 200433
As the simplest molecules, molecular hydrogen ions (MHI) are an excellent system for testing QED. In the Penning-trap setup Alphatrap [1] we can perform high-precision spectroscopy on single MHI using non-destructive quantum state detection. Measurements on the hyperfine structure (HFS) of HD+, allow us to extract the bound g factors of the constituent particles, as well as coefficients of the hyperfine hamiltonian. The latter can be compared with high-precision ab-initio theory and are important for a better understanding of rovibrational spectroscopy performed on this ion, from which fundamental constants, such as mp/me are determined to high precision [2].
We are currently extending our methods to single-ion rovibrational laser spectroscopy of MHI. The development of these techniques is one of the required steps towards spectroscopy of an antimatter H2− ion [3]. I will present an overview of our setup, measurement results of the HFS of HD+ and first steps towards rovibrational laser spectroscopy.
[1] S. Sturm et al., Eur. Phys. J. Spec. Top. 227, 1425-1491 (2019)
[2] I. V. Kortunov, et al., Nature Physics vol 17, 569-573 (2021)
[3] E. Myers, Phys. Rev. A 98, 010101(R) (2018)