Hannover 2013 – scientific programme

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A: Fachverband Atomphysik

A 18: Precision spectroscopy of atoms and ions IV (with Q)

A 18.3: Talk

Tuesday, March 19, 2013, 14:45–15:00, B 305

Hyperfine splitting in lithium-like bismuth — Matthias Lochmann¹, Zoran Andelkovic², Benjamin Botermann³, Michael Bussmann⁴, Andreas Dax⁵, Nadja Frömmgen¹, Michael Hammen¹, Volker Hannen⁶, Raphael Jöhren⁶, Christopher Geppert^1,2, Thomas Kühl², Yuri Litvinov², Jonas Vollbrecht⁶, Wilfried Nörtershäuser³, Thomas Stöhlker^2,7, Richard Thompson⁸, Andrey Volotka⁹, Christian Weinheimer⁶, Weiqiang Wen¹⁰, Elisa Will¹, Danyal Winters², and •Rodolfo Sánchez² — ¹Universität Mainz — ²GSI Helmholtzzentrum, Darmstadt — ³Technische Universität Darmstadt — ⁴Helmholtzzentrum Dresden-Rossendorf — ⁵CERN, Genf — ⁶Universität Münster — ⁷Universität Heidelberg — ⁸Imperial College, London — ⁹Technische Universität Dresden — ¹⁰IMP Lanzhou

High-precision measurements of the hyperfine splitting values on Li- and H-like bismuth ions, combined with precise atomic structure calculations allow us to test QED-effects in the regime of the strongest magnetic fields that are available in the laboratory. Performing laser spectroscopy at the experimental storage ring (ESR) at GSI Darmstadt, we have now succeeded in measuring the hyperfine splitting in Li-like bismuth. Probing this transition has not been easy because of its extremely low fluorescence rate. Details about this challenging experiment will be given and the achieved experimental accuracy will be presented.