Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 46: Poster
HK 46.36: Poster
Donnerstag, 20. März 2014, 16:00–18:00, HZ Poster
Life time of the HFS transition in Li-like 209Bi80+ — Ch. Geppert2,3, V. Hannen1, R. Jöhren1, Th. Kühl2,3,4, M. Lochmann2,3, W. Nörtershäuser2,3, H.-W. Ortjohann1, R. S’anchez3, Th. Stöhlker2,3,4,5, •J. Vollbrecht1, Ch. Weinheimer1, and D. Winters3 — 1Institut für Kernphysik, Uni Münster — 2Institut für Kernchemie, Uni Mainz — 3GSI, Darmstadt — 4Helmholtz Institut Jena — 5Uni Jena
Measuring the hyperfine splitting of heavy, highly charged ions enables tests of QED in strong fields. HFS calculations have a relative uncertainty of more than 10−3 due to the distribution of the magnetic moment (Bohr-Weisskopf-Effekt). With an appropriate comparison of H- and Li-like ions this nuclear structure contribution can be suppressed. Bismuth is a suitable element for these studies, as the HFS splitting for both configurations are in a wavelength range suitable for laser spectroscopy. For this purpose the two ion species were stored in the Experimental Storage Ring at GSI at a velocity of β=0.71. To efficiently collect the forward emitted photons a specially developed movable detector system was used. Thereby the HFS of Li-like 209Bi80+ was successfully measured for the first time. Besides the determination of the transition energy it was possible to extract the life time of the transition out of the collected data. The corresponding analysis and the results are presented on this poster.
This work is supported by BMBF under contract number 05P12PMFAE.