Erlangen 2022 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 3: Studies of Nuclear Metastable States
MS 3.3: Vortrag
Dienstag, 15. März 2022, 11:20–11:35, MS-H9
Shedding light on low-lying metastable states in the heaviest elements with SHIPTRAP at GSI — •Francesca Giacoppo1,2, Brankica Anďelić1,2,3, Luisa Arcila Gonzalez3, Joaquín Berrocal4, Lennart Blaauw3, Klaus Blaum5, Michael Block1,2,6, Pierre Chauveau1,2, Stanislav Chenmarev2,5,7, Christoph E. Düllmann1,2,6, Julia Even3, Manuel J. Gutiérrez1,2,4, Fritz P. Heßberger1,2, Nasser Kalantar-Nayestanaki3, Oliver Kaleja1,8, Steffen Lohse2,6, Enrique Minaya Ramirez9, Andrew Mistry1, Elodie Morin9, Yury Nechiporenko7,10, Dennis Neidherr1, Steven Nothhelfer2,6, Yuri Novikov7,10, Sebastian Raeder1,2, Elisabeth Rickert2,6, Daniel Rodríguez4, Lutz Schweikhard8, Peter G. Thirolf11, Jessica Warbinek1,2,6, and Alexander Yakushev1,2 — 1GSI Darmstadt, Germany — 2HIM Mainz, Germany — 3University of Groningen, the Nederlands — 4University of Granada, Spain — 5MPIK Heidelberg, Germany — 6JGU Mainz, Germany — 7PNPI Gatchina, Russia — 8Universiy of Greifswald, Germany — 9IJCLab Orsay, France — 10Saint Petersburg State University, Russia — 11LMU Munich, Germany
Probing the limit of existance at the uppermost corner of the nuclear chart requires a deep understanding of the nuclear properties of very heavy nuclides and their evolution in the superheavy region.
In the framework of the FAIR phase-0 program, the goal of directly investigating the mass of superheavy nuclei (Z104) is pursued at the Penning-trap mass spectrometer SHIPTRAP at GSI. In the latest campaign the masses of the ground states as well as of low-lying metastable states of 257Rf (Z=104) and 258Db (Z=105) have been precisely measured. In addition, several heavy nuclides above the Z=82 magic shell closure have been investigated. Many of these nuclei display shape deformation and complex shell configurations with often more than one competing level at low energies. Such states have traditionally been studied by decay and laser spectroscopy, as for instance the 206Fr-202At-198Bi chain. In our last campaign the excitation energies of the metastable states in some of the key nuclei in this region have been finally directly measured, allowing to benchmark the proposed level and decay schemes.