PSAS 2012
International Conference on Precision Physics
of Simple Atomic Systems 2012
Eltville, Germany -
Information

Title:	Dr.
Family Name:	Geppert
First Name:	Christopher
Gender:	male
E-Mail:	c.geppertgsi.de
Affiliation for Badge:	Helmholtz Institut Mainz
Institute:	Helmholtz Institut Mainz
Address (Street):	Johann-Joachim-Becher-Weg 36
Postal Code, City:	55128 Mainz
Country:	Germany
Phone:	06131-3925318
Fax:
Arrival Date:	June 11
Departure Date:	June 15
Excursion with Conference Dinner:	Selected
Payment:	Bank transfer to GSI
Title:	Laser Spectroscopy on relativistic Bi-Ions at the Storage Ring ESR at GSI
Abstract:	The precise determination of the hyperfine structure (hfs) of highly charged ions allows testing of theoretical QED calculations with laser spectroscopy results. While a variety of precision experiments is probing QED with highest accuracy in weak fields where Zα<<1 , the investigation on heavy and highly-charged ions addresses the regime of strong fields where furthermore the evolution parameter- Zα is in the order of Zα~1. The LIBELLE (E083)-Collaboration at the Helmholtzzentrum für Schwerionenforschung (GSI) studied hydrogen- and lithium-like bismuth ions, which were stored at a velocity of β=0.7 in the storage ring ESR. These ions have been probed by scanning a Doppler-shifted laser and looking for fluorescence light from the forbidden hfs-transition by several photomultiplier tubes along the ESR. After a 12 years lasting search, the transition has been finally observed during a recent beam time. First results and the current status of data analysis will be presented.

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