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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 bismuthMatthias Lochmann1, Zoran Andelkovic2, Benjamin Botermann3, Michael Bussmann4, Andreas Dax5, Nadja Frömmgen1, Michael Hammen1, Volker Hannen6, Raphael Jöhren6, Christopher Geppert1,2, Thomas Kühl2, Yuri Litvinov2, Jonas Vollbrecht6, Wilfried Nörtershäuser3, Thomas Stöhlker2,7, Richard Thompson8, Andrey Volotka9, Christian Weinheimer6, Weiqiang Wen10, Elisa Will1, Danyal Winters2, and •Rodolfo Sánchez21Universität 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.

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