The candidate will work on laser spectroscopy of highly charged ions with the goal to test quantum electrodynamics in light and heavy isotopes. We are performing laser spectroscopy at the ESR and CRYRING storage rings at GSI/FAIR with the goal to develop optical pumping , and to improve the sensitivity in laser spectroscopy of lithium-like heavy ions [ Phys. Rev. Accel. Beams 24, 024701 (2021)] by combining laser spectroscopy with dielectronic recombination (DR). Nat. Commun. 8, 15484 (2017)
Polarization of an ion bean by optical pumping
At CRYRING, we have performed first tests of optical pumping using continuous wave (cw) lasers to polarized Mg+ ions and observed surprising results. We are presently getting the continuation of this experiment ready, which will take place in autumn 2023.
Getting granular on QED
In a beamtime at ESR, which took place in spring 2022, we were able to observe for the very first time the hyperfine transition of an artificially produced 208Bi82+ ion beam. A rigorous test of strong-field QED is now in reach by measuring the hyperfine transition in 208Bi80+. The preparation is just starting and a first attempt of this experiment is planned to take place early 2024.
Further widening of the research profile is possible by participating at collinear laser spectroscopy experiments in our other research areas at ANL, FRIB and at ISOLDE.
Application: If you formally want to apply, please send a single pdf document including a letter of motivation, your CV, a transcript of your university grade records, and two contact addresses for letters of reference.
Contact: Prof. Dr. Wilfried Nörtershäuser (S2|14 410, firstname.lastname@example.org-…), Dr. Rodolfo Sanchez (), Dr. Zoran Andelkovic ( email), Dr. Konstantin Mohr ( email) email