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MS: Fachverband Massenspektrometrie

MS 5: Precision Mass Spectrometry II

MS 5.2: Vortrag

Dienstag, 10. März 2020, 15:45–16:00, f128

High-precision mass spectrometry of superheavy elements at SHIPTRAP: latest experiments, status and performances of the setup. — •Pierre Chauveau for the SHIPTRAP collaboration^1,2, Brankica Andelić^1,3, Olesya Bezrodnova^4,5, Klaus Blaum⁶, Michael Block^1,2,7, Stanislav Chenmarev^5,7, Premaditya Chhetri^1,2, Christoph E. Düllmann^1,2,7, Martin Eibach^2,8, Julia Even³, Sergey Eliseev⁶, Pavel Filianin⁶, Francesca Giacoppo^1,2, Stefan Götz^1,2,7, Manuel Gutiérrez⁹, Frank Herfurth², Fritz-Peter Hessberger^1,2, Nasser Kalantar-Nayestanaki³, Oliver Kaleja^2,6,7, Jadambaa Khuyagbaatar^1,2, Jacques J.W. van de Laar^1,7, Mustapha Laatiaoui¹, Steffen Lohse^1,7, Natalia Martynova^4,5, Enrique Minaya Ramirez¹⁰, Andrew Mistry^1,2, Tobias Murböck², Yuri Novikov^4,5, Sebastian Raeder², Daniel Rodriguez⁹, Fabian Schneider^1,7, Lutz Schweikhard⁸, Peter Thirolf¹¹, and Alexander Yakushev^1,2 — ¹HI Mainz — ²GSI Darmstadt — ³Univ. Groningen — ⁴SPbSU St. Petersburg — ⁵PNPI KI Gatchina — ⁶MPIK Heidelberg — ⁷JGU Mainz — ⁸Univ. Greifswald — ⁹Univ. de Granada — ¹⁰IPN Orsay — ¹¹LMU München

Mass measurements in the very heavy and superheavy regions of the nuclear chart are crucial to understand the increased stability of certain superheavy elements and can be used as anchor points for nuclear models attempting to pinpoint the position of the island of stability. In the latest experimental campaigns with the SHIPTRAP setup, ground states masses and excitation energies of low-lying isomers in nobelium (Z=102), lawrencium (Z=103) and rutherfordium (Z=104) isotopes have been measured with very high accuracy. The Phase-Imaging Ion-Cyclotron-Resonance technique has been successfully applied for such challenging measurements characterized by the very low ion production rate and number of collected events. These results have been accomplished thanks to careful investigations and improvements of the efficiency of the SHIPTRAP setup, paving the way for the first direct high-precision mass spectrometry of even heavier and more exotic nuclides, including dubnium (Z=105) isotopes. In this contribution, an overview on the efficiency of the setup as well as a summary of recent experimental campaigns will be given.