Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 44: Precision Spectrosocopy VII (nuclear systems) (joint session A/Q)

A 44.6: Vortrag

Freitag, 9. März 2018, 11:45–12:00, K 1.016

Laser spectroscopy of the heaviest actinides — •S. Raeder^1,2, D. Ackermann^2,3, H. Backe⁴, M. Block^1,2,4, B. Cheal⁶, P. Chhetri^2,5, C. E. Düllmann^1,2,4, M. Eibach^2,7, J. Even⁸, R. Ferrer⁹, F. Giacoppo^1,2, S. Götz^1,2,4, F.P. Heßberger^2,5, O. Kaleja^2,4,10, J. Khuyagbaatar^1,2, P. Kunz¹¹, M. Laatiaoui⁹, F. Lautenschläger^2,5, W. Lauth⁴, L. Lens^2,4, N. Lecesne³, A. K. Mistry^1,2, E. Minaya Ramirez¹², Th. Walther⁵, A. Yakushev^1,2, and Z. Zhang¹³ — ¹Helmholtz-Institut Mainz — ²GSI — ³GANIL — ⁴JGU Mainz — ⁵TU Darmstadt — ⁶Uni of Liverpool — ⁷Universität Greifswald — ⁸KVI-CART, Uni of Groningen — ⁹KU-Leuven — ¹⁰MPIK — ¹¹TRIUMF — ¹²IPNO — ¹³IMP Lanzhou

Laser spectroscopy of transfermium elements with Z>100 probes the influence of electron correlation, relativistic and QED effects on the atomic shell structure. These studies are hampered by low production rates and the fact that atomic information is initially available only from theoretical predictions. Applying the sensitive Radiation Detected Resonance Ionization Spectroscopy technique at the SHIP velocity filter in GSI, optical transitions in the element nobelium (Z=102) were detected for the first time. Besides the characterization of a strong optical ground-state transition in the isotopes ^252,253,254No, Rydberg states were measured enabling the extraction of the first ionization potential of nobelium with a high precision. These results will be discussed as well as the prospects for future investigations involving the study of additional nobelium isotopes and the exploration of the atomic structure of the next heavier element, lawrencium (Z=103).