Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 9: Precision Spectroscopy II

A 9.1: Vortrag

Montag, 6. März 2017, 17:00–17:15, N 3

Laser spectroscopy of the heaviest elements — •Sebastian Raeder¹, Dieter Ackermann^2,3, Hartmut Backe⁴, Michael Block^1,2,4, Bradley Cheal⁶, Premaditya Chhetri^2,5, Christian Droese², Christoph E. Düllmann^1,2,4, Julia Even⁷, Rafael Ferrer⁸, Francesca Giacoppo^1,2, Stefan Götz^1,2,4, Fritz Peter Heßberger^2,5, Oliver Kaleja², Jadambaa Khuyagbaatar^1,2, Peter Kunz⁹, Mustapha Laatiaoui^1,2, Felix Lautenschläger^2,5, Werner Lauth⁴, Lotte Lens^2,4, Nathalie Lecesne³, Andrew K. Mistry^1,2, Enrique Minaya Ramirez¹⁰, Thomas Walther⁵, Alexander Yakushev^1,2, and Zhiyuan Zhang¹¹ — ¹Helmholtz-Institut Mainz — ²GSI, Darmstadt — ³GANIL, Caen — ⁴Universität Mainz — ⁵TU Darmstadt — ⁶University of Liverpool — ⁷KVI-CART, Groningen — ⁸KU-Leuven — ⁹TRIUMF, Vancouver — ¹⁰IPN Orsay — ¹¹IMP Lanzhou

Laser spectroscopy of the heaviest elements with Z>100 enables studying the influence of relativistic and QED effects on the atomic shell structure, but is hampered by the low production rates available. Applying the sensitive Radiation Detected Resonance Ionization Spectroscopy technique at the SHIP velocity filter in GSI, we identified optical transitions in the element nobelium (Z=102) for the first time. Besides the identification of a strong optical ground-state transition, the hyperfine structure splitting in the isotope ²⁵³No was measured along with the isotope shifts in ^252−254No. These results will be discussed and the prospects for first attempts in extending laser spectroscopy to the next of the heaviest elements, lawrencium, will be given.