Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 33: Precision spectroscopy of atoms and ions I

Q 33.6: Vortrag

Dienstag, 13. März 2012, 15:30–15:45, V55.01

Towards laser spectroscopy of trans-fermium elements — •Mustapha Laatiaoui1,2, Hartmut Backe3, Michael Block2, Fritz-Peter Heßberger2, Peter Kunz4, Felix Lautenschläger1, Werner Lauth3, and Thomas Walther11Institut für Angewandte Physik, TU-Darmstadt, 64289 Darmstadt — 2Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt — 3Institut für Kernphysik, Universität Mainz, 55099 Mainz — 4TRIUMF, Vancouver, Canada

The atomic structure of the heaviest elements allows to investigate relativistic effects and their description in modern theories. However, beyond the element fermium with a charge number Z=100, detailed atomic spectroscopy, even with the most sensitive laser methods, is hampered by their low production rates in nuclear fusion reactions. At present no experimental information on atomic levels is available for these elements. In our experiments [H. Backe et al., Eur. Phys. J. D 45 (2007) 99] behind the velocity filter SHIP at the GSI, we employ the radiation detected laser resonance ionization technique to search for the predicted 5f147s7p 1P1 level in 254No (Z=102). In a first 54 h experiment, the evaporation temperature of nobelium was determined and the atomic level search was started. In this talk, a brief status report on these activities will be given.

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