Hannover 2020 – wissenschaftliches Programm
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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 collaboration1,2, Brankica Andelić1,3, Olesya Bezrodnova4,5, Klaus Blaum6, Michael Block1,2,7, Stanislav Chenmarev5,7, Premaditya Chhetri1,2, Christoph E. Düllmann1,2,7, Martin Eibach2,8, Julia Even3, Sergey Eliseev6, Pavel Filianin6, Francesca Giacoppo1,2, Stefan Götz1,2,7, Manuel Gutiérrez9, Frank Herfurth2, Fritz-Peter Hessberger1,2, Nasser Kalantar-Nayestanaki3, Oliver Kaleja2,6,7, Jadambaa Khuyagbaatar1,2, Jacques J.W. van de Laar1,7, Mustapha Laatiaoui1, Steffen Lohse1,7, Natalia Martynova4,5, Enrique Minaya Ramirez10, Andrew Mistry1,2, Tobias Murböck2, Yuri Novikov4,5, Sebastian Raeder2, Daniel Rodriguez9, Fabian Schneider1,7, Lutz Schweikhard8, Peter Thirolf11, and Alexander Yakushev1,2 — 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.