Rostock 2019 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 10: Precision Spectroscopy of atoms and ions II (joint session A/Q)

Q 10.4: 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 ²P_1/2 − ²P_3/2 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.