Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 6: Precision Spectroscopy of atoms and ions II (joint session A/Q)
A 6.4: Vortrag
Montag, 11. März 2019, 15:00–15:15, S HS 2 Physik
Spectroscopy of an electric-dipole-forbidden fine structure transition with a single 40Ar13+ ion at ALPHATRAP — •Alexander Egl1, Ioanna Arapoglou1, Martin Höcker1, Kristian König2, Tim Ratajczyk2, Tim Sailer1, Bingsheng Tu1, Andreas Weigel1, Robert Wolf1, Wilfried Nörtershäuser2, Klaus Blaum1, and Sven Sturm1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Institut für Kernphysik,Technische Universität Darmstadt, Germany
Highly charged ions are excellent candidates to test fundamental theories such as bound-state quantum electrodynamics (BS-QED). The strong electromagnetic fields which can be found in those systems can shift the energies of fine structure or even hyperfine structure transitions into the optical regime. Measuring such transitions constitutes a stringent test on BS-QED including relativistic many electron calculations and nuclear contributions.
We present a novel method that does not rely on any fluorescence signal which allows to find straight forward a transition by using the continuous Stern Gerlach effect. Using this method we have recently performed laser spectroscopy of the magnetic dipole (M1) 2p 2P1/2 − 2P3/2 fine structure transition in 40Ar13+ stored in a cryogenic Penning-trap system of the ALPHATRAP g-factor experiment at the Max-Planck-Institut für Kernphysik. Results of this will be presented.