Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 3: Structure and Dynamics of Nuclei I

HK 3.4: Vortrag

Montag, 26. Februar 2018, 15:00–15:15, HZO 70

Laser spectroscopy of the heaviest elements — •P. Chhetri^1,2, D. Ackerman^2,3, H. Backe⁴, M. Block^2,4,5, B. Cheal⁶, Ch. E. Düllmann^2,4,5, M. Eibach^2,7, J. Even⁸, R. Ferrer⁹, F. Giacoppo^2,5, S. Götz^2,4,5, F. P. Heßberger^2,5, O. Kaleja², J. Khuyagbaatar², P. Kunz¹⁰, M. Laatiaoui^2,5,9, F. Lautenschläger^1,2, W. Lauth⁴, L. Lens^2,4, N. Lecesne³, A. K. Mistry^2,5, E. Minaya Ramirez¹¹, T. Murböck², S Raeder^2,5, Th. Walther¹, A. Yakushev^2,5, and Z. Zhang¹² — ¹TU Darmstadt — ²GSI — ³GANIL — ⁴Universität Mainz — ⁵Helmholtz-Institut Mainz — ⁶University of Liverpool — ⁷Universität Greifswald — ⁸KVI-CART — ⁹KU-Leuven — ¹⁰TRIUMF — ¹¹IPN Orsay — ¹²IMP Lanzhou

Laser spectroscopy of the heaviest elements with Z>100 allows 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 at GSI, we identified optical transitions in the element nobelium (Z=102) for the first time [1]. Besides the identification of a strong optical ground state transition, its hyperfine structure splitting in the isotope ²⁵³No was measured along with the isotope shifts in ^252−254No. These results will be discussed and an outlook on first attempts in extending laser spectroscopy to the next heavier element, lawrencium (Z=103), will be given.

[1] M. Laatiaoui et al., Nature 538, 495 (2016)