Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy

S. Raeder, D. Ackermann, H. Backe, R. Beerwerth, J. C. Berengut, M. Block, A. Borschevsky, B. Cheal, P. Chhetri, Ch E. Düllmann, V. A. Dzuba, E. Eliav, J. Even, R. Ferrer, V. V. Flambaum, S. Fritzsche, F. Giacoppo, S. Götz, F. P. Heßberger, M. HuyseU. Kaldor, O. Kaleja, J. Khuyagbaatar, P. Kunz, M. Laatiaoui, F. Lautenschläger, W. Lauth, A. K. Mistry, E. Minaya Ramirez, W. Nazarewicz, S. G. Porsev, M. S. Safronova, U. I. Safronova, B. Schuetrumpf, P. Van Duppen, T. Walther, C. Wraith, A. Yakushev

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58 Scopus citations


Until recently, ground-state nuclear moments of the heaviest nuclei could only be inferred from nuclear spectroscopy, where model assumptions are required. Laser spectroscopy in combination with modern atomic structure calculations is now able to probe these moments directly, in a comprehensive and nuclear-model-independent way. Here we report on unique access to the differential mean-square charge radii of No252,253,254, and therefore to changes in nuclear size and shape. State-of-the-art nuclear density functional calculations describe well the changes in nuclear charge radii in the region of the heavy actinides, indicating an appreciable central depression in the deformed proton density distribution in No252,254 isotopes. Finally, the hyperfine splitting of No253 was evaluated, enabling a complementary measure of its (quadrupole) deformation, as well as an insight into the neutron single-particle wave function via the nuclear spin and magnetic moment.

Original languageEnglish
Article number232503
JournalPhysical Review Letters
Issue number23
StatePublished - 8 Jun 2018


FundersFunder number
Not addedST/L005670/1
Helmholtz-Institut Mainz
National Science FoundationPHY-1620687
National Science Foundation
U.S. Department of EnergyDE-SC0018083, DOE-DE-NA0002847, DE-SC0013365
U.S. Department of Energy
Office of Science
Horizon 2020 Framework Programme
National Research Council
Science and Technology Facilities CouncilST/P004598/1
Science and Technology Facilities Council
European Commission
Australian Research Council
Bundesministerium für Bildung und Forschung05P15SJCIA, 06MZ169I, 06LM236I, 05P09RDFN4, 05P12RDFN8, 05P15RDFN1
Bundesministerium für Bildung und Forschung
Horizon 2020654002, ENSAR2
Horizon 2020
GSI Helmholtzzentrum für Schwerionenforschung


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