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HK: Fachverband Physik der Hadronen und Kerne

HK 61: Structure and Dynamics of Nuclei X

HK 61.1: Vortrag

Freitag, 31. März 2017, 14:00–14:15, F 33

Laser spectroscopy of the heaviest elements at GSI — •Premaditya Chhetri for the RADRIS collaboration — TU Darmstadt — GSI Darmstadt

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 [1] technique at the SHIP velocity filter at GSI, we identified optical transitions in the element nobelium (Z=102) for the first time [2]. 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, will be given.

[1] H. Backe, W. Lauth, M. Block, M. Laatiaoui, Nuclear Physics A 944 (2015) 492

[2] M. Laatiaoui, W. Lauth, H. Backe, M. Block et. al. Nature 538 (2016) 495