Erlangen 2022 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Precision spectroscopy of atoms and ions (joint session A/Q)

A 20.19: Poster

Mittwoch, 16. März 2022, 16:30–18:30, P

Study of Highly Charged Ions for the Tests of Bound-State QED — •Manasa Chambath¹, Khwaish Anjum^1,2, Patrick Baus³, Gerhard Birkl³, Kanika Kanika^1,4, Jeffrey Klimes^1,4,5, Wolfgang Quint¹, and Manuel Vogel¹ — ¹GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — ²Delhi Technological University, Delhi, India — ³Institute for Applied Physics, TU Darmstadt, Germany — ⁴Heidelberg Graduate School for Fundamental Physics, Heidelberg, Germany — ⁵Max Planck Institute for Nuclear Physics, Heidelberg, Germany

The high-precision measurement of the Zeeman splitting of fine- and hyper-fine structure levels can be performed using spectroscopy techniques. The Penning trap ARTEMIS at the HITRAP facility at GSI utilises the method of laser-microwave double-resonance spectroscopy to measure the magnetic moment and to test bound-state QED calculations by g-factor measurements of heavy, highly charged ions like Ar13+ and Bi82+. Non-destructive electronic detection is used to analyse and resistively cool the stored ions. Different ion species in the trap are resolved according to their charge-to-mass ratio by fixing the detection frequency and ramping over a range of trapping potentials. By selectively exciting the axial motion, Ar13+ ions are isolated from the ion cloud for the g-factor measurements. Studies are also done to determine the phase transition of dense ion clouds due to the discontinuous behaviour of spectral features during cooling.