SAMOP 2021 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 2: Precision Mass Measurements II

MS 2.4: Vortrag

Montag, 20. September 2021, 15:00–15:15, H3

Investigation of ground and metastable nuclear states in the heaviest nuclei at SHIPTRAP — •Francesca Giacoppo^1,2, Brankica Anďelić^1,2,3, Luisa Arcila Gonzalez³, Joaquín Berrocal Sánchez⁴, Lennart Blaauw³, Klaus Blaum⁵, Michael Block^1,2,6, Pierre Chauveau^1,2, Stanislav Chenmarev^2,5, Premaditya Chhetri^1,2, Christoph E. Düllmann^1,2,6, Martin Eibach¹, Julia Even³, Pavel Filianin⁵, Manuel Jesús Gutiérrez Torres^1,2,4, Fritz P. Heßberger^1,2, Nasser Kalantar-Nayestanaki³, Oliver Kaleja^1,7, Jacques W. van de Laar^2,6, Mustapha Laatiaoui^2,6, Steffen Lohse^2,6, Enrique Minaya Ramirez⁸, Andrew Mistry¹, Elodie Morin⁸, Yury Nechiporenko^9,10, Dennis Neidherr¹, Steven Nothhelfer^2,6, Yuri Novikov^9,10, Sebastian Raeder^1,2, Elisabeth Rickert^2,6, Daniel Rodríguez⁴, Lutz Schweikhard⁷, Peter Thirolf¹¹, Jessica Warbinek^1,2,6, and Alexander Yakushev^1,2 — ¹GSI Darmstadt, Germany — ²HIM Mainz, Germany — ³University of Groningen, the Nederlands — ⁴University of Granada, Spain — ⁵MPIK Heildeberg, Germany — ⁶JGU University Mainz, Germany — ⁷Universiy of Greifswald, Germany — ⁸IJCLab Orsay, France — ⁹PNPI Gatchina, Russia — ¹⁰Saint Petersburg State University, Russia — ¹¹LMU University Munich, Germany

In a very recent experimental campaign performed with the Penning trap spectrometer SHIPTRAP at GSI the superheavy isotopes ²⁵⁷Rf and ²⁵⁸Db were investigated despite their low production rates. The masses of the ground state and isomeric states as well as for several nuclides with Z=82−98 were directly measured with high accuracy.

Valuable information on the nuclear shell structure, its strength and evolution in the region of the heaviest elements can be directly derived from our experimental findings.The latter, therefore, complement results achieved in decay spetroscopy studies. Furthermore, such accurate masses in the vicinity of the superheavy element region serve as anchor points to determine the masses of heavier nuclei which are crucial for nuclear models attempting to pinpoint the position of the predicted island of stability.

In this contribution an overview of the results will be given.