Dr
Manuel J. Gutiérrez
(University of Greifswald, Germany / GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany)
Speculation about the existence of elements heavier than uranium started in the late 19th century [1]. Thanks to an increased understanding of nuclear structure and decades of developments, transuranic and eventually superheavy elements were discovered [2]. The latter owe their existence to nuclear shell effects, which enhance their stability [3]. The strength of these effects can be quantified through direct mass measurements performed with Penning traps [4], providing invaluable information on the nuclear shell evolution. Furthermore, the excitation energies of low-lying, long-lived metastable nuclear states, common in the heavy nuclei, can be obtained from the directly measured masses, complementing decay spectroscopy studies and providing further information.
The goal of the SHIPTRAP experiment is to study heavy and superheavy nuclei produced via fusion-evaporation reactions at rates well below one particle per hour. Nuclei produced at such low rates are accessible thanks to the implementation of a cryogenic buffer-gas stopping cell [5] and the development of the Phase-Imaging Ion-Cyclotron-Resonance technique [6]. These enabled the study of more exotic nuclei [7]. In this contribution, the latest results, obtained as part of the FAIR phase-0 campaign at GSI, will be presented. These comprise measurements on the ground‑state masses and isomeric‑state‑energy measurements of nuclides from 196Bi to 257Rf.
[1] H. Kragh, Eur. Phys. J. H 38 411-431 (2013)
[2] S. Hofmann and G. Münzenberg, Rev. Mod. Phys. 72, 733 (2000)
[3] S.A. Giuliani et al, Rev. Mod. Phys. 91 011001 (2019)
[4] M. Block, Nucl. Phys. A 944 471-491 (2015)
[5] O. Kaleja et al, Nucl. Instrum. Methods Phys. Res. B 463 280-285 (2020)
[6] S. Eliseev et al, Appl. Phys. B 114 107–128 (2014)
[7] O. Kaleja et al, Phys. Rev. C 106 054325 (2022)
Dr
Manuel J. Gutiérrez
(University of Greifswald, Germany / GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany)
Dr
Brankica Andjelić
(GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany / University of Groningen, the Netherlands)
Luisa Arcila González
(University of Groningen, the Netherlands)
Dr
Joaquín Berrocal Sánchez
(Universidad de Granada)
Lennart Blaauw
(University of Groningen, the Netherlands)
Prof.
Klaus Blaum
(MPIK Heidelberg, Germany)
Prof.
Michael Block
(GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany / JGU Mainz, Germany)
Alexandre Brizard
(GSI Darmstadt, Germany / GANIL, France)
Dr
Pierre Chauveau
(GANIL, France)
Jennifer Cipagauta Mora
(University of Groningen, the Netherlands)
Dr
Stanislav Chenmarev
(MPIK Heidelberg, Germany)
Dr
Premaditya Chhetri
(Helmholtz Institut Mainz, Germany / JGU Mainz, Germany)
Prof.
Christoph Düllmann
(GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany / JGU Mainz, Germany)
Prof.
Julia Even
(University of Groningen, the Netherlands)
Dr
Francesca Giacoppo
(GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany)
Briain Hartigan
(GSI Darmstadt, Germany / University of Groningen, the Netherlands)
Dr
Fritz-Peter Heßberger
(GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany)
Prof.
Nasser Kalantar-Nayestanaki
(University of Groningen, the Netherlands)
Dr
Tom Kieck
(GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany / JGU Mainz, Germany)
Dr
Oliver Kaleja
(University of Greifswald, Germany / GSI Darmstadt, Germany)
Steffen Lohse
(Helmholtz Institut Mainz, Germany / JGU Mainz, Germany)
Dr
Enrique Minaya Ramírez
(IJCLab Orsay, France)
Dr
Andrew Kishor Mistry
(GSI Darmstadt, Germany)
Sophie Morard
(IJCLab Orsay, France)
Dr
Elodie Morin
(IJCLab Orsay, France)
Dr
Dennis Neidherr
(GSI Darmstadt, Germany)
Dr
Steven Nothhelfer
(Helmholtz Institut Mainz)
Jaykumar Patel
(GSI Darmstadt, Germany / TU Darmstadt, Germany)
Dr
Sebastian Raeder
(GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany)
Dr
Elisabeth Rickert
(Helmholtz Institut Mainz, Germany / JGU Mainz, Germany)
Prof.
Daniel Rodríguez
(Universidad de Granada)
Prof.
Lutz Schweikhard
(University of Greifswald, Germany)
Prof.
Peter G. Thirolf
(LMU Munich, Germany)
Kenneth van Beek
(GSI Darmstadt, Germany / TU Darmstadt, Germany)
Dr
Jessica Warbinek
(GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany / JGU Mainz, Germany)
Dr
Alexander Yakushev
(GSI Darmstadt, Germany / Helmholtz Institut Mainz, Germany)
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