Erlangen 2018 – scientific programme

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A: Fachverband Atomphysik

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

A 44.8: Talk

Friday, March 9, 2018, 12:15–12:30, K 1.016

Desorption enthalpy studies of the heaviest actinides for laser spectroscopic investigations — •T. Murböck¹, D. Ackermann^1,2, H. Backe³, M. Block^1,3,4, B. Cheal⁵, P. Chhetri^1,6, Ch. E. Düllmann^1,3,4, M. Eibach^1,7, J. Even⁸, R. Ferrer⁹, F. Giacoppo^1,4, S. Götz^1,3,4, F.P. Heßberger^1,4, O. Kaleja^1,3,10, J. Khuyagbaatar^1,4, P. Kunz¹¹, M. Laatiaoui^1,4, F. Lautenschläger^1,6, W. Lauth³, L. Lens^1,3, N. Lecesne², A. K. Mistry^1,4, E. Minaya Ramirez¹², S. Raeder⁴, P. Van Duppen⁹, Th. Walther⁶, A. Yakushev^1,4, and Z. Zhang¹³ — ¹GSI — ²GANIL — ³Universität Mainz — ⁴HI Mainz — ⁵University of Liverpool — ⁶TU Darmstadt — ⁷Universität Greifswald — ⁸KVI-CART, University of Groningen — ⁹KU-Leuven — ¹⁰MPIK — ¹¹TRIUMF — ¹²IPN Orsay — ¹³IMP Lanzhou

To probe the atomic shell structure of the heaviest actinides with Z>100, the Radiation Detected Resonance Ionization Spectroscopy (RADRIS) technique is applied at SHIP at GSI. After production in high-energy fusion-evaporation reactions the recoil ions are stopped in a buffer-gas cell and collected onto a filament. Subsequent thermal evaporation as neutral atoms allows to probe the atomic structure using laser spectroscopy. The desorption enthalphy of these elements crucially determines the efficiency of the evaporation and the RADRIS method. In this talk, evaporation of nobelium (Z=102) and lawrencium (Z=103) from tantalum is revisited. Prospects for desorption studies from a larger variety of surfaces to extend laser-spectroscopic investigations to heavier elements will be discussed.