München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Structure and Dynamics of Nuclei VII

HK 37.7: Vortrag

Mittwoch, 20. März 2019, 15:45–16:00, HS 16

Extraction of nuclear parameters from spectra of heavy muonic atoms — •Niklas Michel, Natalia S. Oreshkina, and Christoph H. Keitel — Max Planck Institute for Nuclear Physics, Heidelberg, Germany

We consider bound states between an atomic nucleus and a muon, so called muonic atoms. Such systems can be considered as hydrogen-like and therefore the spectra can be predicted with high accuracy [1,2]. Just as in common electronic atoms, there is fine and hyperfine splitting, but the significance of the various contributions differs dramatically. In particular, nuclear structure effects can scale up to 50% of the binding energy, and vacuum polarization effects due to virtual electron-positron pairs are larger than all other corrections from quantum electrodynamics. We calculate the level structure in heavy muonic atoms and analyze the dependence on nuclear parameters like quadrupole moments and RMS charge radii. In connection with recent experiments performed by the muX Collaboration, we discuss the extraction of nuclear parameters from measured x-ray spectra of muonic atoms.

[1] N. Michel, N. S. Oreshkina, C. H. Keitel, Phys. Rev. A 96, 032510

[2] N. Michel, N. S. Oreshkina, arXiv:1809.06623