Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 6: Precision Spectroscopy of atoms and ions II (joint session A/Q)

A 6.1: Hauptvortrag

Montag, 11. März 2019, 14:00–14:30, S HS 2 Physik

Laser spectroscopy of transferium elements — •S. Raeder^1,2, D. Ackermann^2,3, H. Backe⁴, M. Block^1,2,4, B. Cheal⁵, P. Chhetri^2,6, Ch. E. Düllmann^1,2,4, M. Eibach², J. Even⁷, R. Ferrer⁸, F. Giacoppo^1,2, S. Götz^1,2,4, F.P. Heßberger², O. Kaleja^2,4,9, J. Khuyagbaatar^1,2, P. Kunz¹⁰, M. Laatiaoui^1,4, W. Lauth⁴, L. Lens^2,4, N. Lecesne³, A. K. Mistry^1,2, E. Minaya Ramirez¹¹, T. Murböck^1,2, P. van Duppen⁸, Th. Walther⁶, and A. Yakushev^1,2 — ¹HI Mainz — ²GSI — ³GANIL — ⁴JGU Mainz — ⁵U. of Liverpool — ⁶TU Darmstadt — ⁷KVI-CART, U. of Groningen — ⁸KU Leuven — ⁹MPIK — ¹⁰TRIUMF — ¹¹IPNO

Laser spectroscopy of the heaviest elements is a versatile tool to precisely measure the energies of shell electrons, which are strongly influenced by electron-electron correlation, relativity and QED effects. The study of transfermium elements with Z>100 is hampered by low production rates and the fact that any atomic information is at best available from theoretical predictions. Using the sensitive radiation detected resonance ionization spectroscopy technique coupled to the SHIP separator at GSI, a strong optical ¹S₀→ ¹P₁ ground-state transition in the element nobelium (Z=102) was identified and characterized. In further studies the isotopes ^252,253,254No were measured and high- lying Rydberg levels were identified which enabled the extraction of the first ionization potential with unreached 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).