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Charge Radii of Neutron-Rich Scandium Isotopes and the Seniority Symmetry in the 0⁢𝑓7/2 Shell

Journal Article · · Physical Review Letters
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  1. Peking University, Beijing (China)
  2. KU Leuven (Belgium)
  3. University of New South Wales (Australia); UNSW Nuclear Innovation Centre (Australia)
  4. The University of Manchester (United Kingdom)
  5. Max-Planck-Institut für Kernphysik, Heidelberg (Germany)
  6. University of Groningen (The Netherlands)
  7. University of Liverpool (United Kingdom)
  8. Massachusetts Institute of Technology, Cambridge, MA (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  9. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  10. TRIUMF, Vancouver, BC (Canada); McGill University, Montreal, QC (Canada)
  11. TRIUMF, Vancouver, BC (Canada); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Texas A& M University, College Station, TX (United States)
  12. Technische Universität Darmstadt (Germany)
  13. TRIUMF, Vancouver, BC (Canada); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  14. University of Tsukuba (Japan); Technische Universität Darmstadt (Germany); GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt (Germany); Max-Planck-Institut für Kernphysik, Heidelberg (Germany)
  15. University of Jyväskylä (Finland)
  16. Michigan State University, East Lansing, MI (United States)
  17. Max-Planck-Institut für Kernphysik, Heidelberg (Germany); Universität Mainz (Germany)
  18. KU Leuven (Belgium); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  19. Universität Erlangen (Germany)
  20. Max-Planck-Institut für Kernphysik, Heidelberg (France); European Organization for Nuclear Research (CERN), Geneva (Switzerland); Université Paris-Saclay, Orsay (France)
+ Show Author Affiliations

Nuclear charge radii of neutron-rich 47–49Sc isotopes were measured using collinear laser spectroscopy at CERN-ISOLDE. The new data reveal that the charge radii of scandium isotopes exhibit a distinct trend between 𝑁 = 20 and 𝑁 = 28, with 41Sc and 49Sc isotopes having similar values, mirroring the closeness of the charge radii of 40Ca and 48Ca. Theoretical models that successfully interpret the radii of calcium isotopes could not account for the observed behavior in scandium radii, in particular the reduced odd-even staggering. Remarkably, the inclusion of the new 49Sc radius data has unveiled a similar trend in the charge radii of 𝑁 = 28 isotones and 𝑍 = 20 isotopes when adding the protons atop the 48Ca core and the neutrons atop the 40Ca core, respectively. We demonstrate that this trend is consistent with the prediction of the seniority model.

Research Organization:
Massachusetts Institute of Technology, Cambridge, MA (United States)
Sponsoring Organization:
National Key R&D Program of China; National Natural Science Foundation of China; New Cornerstone Science Foundation; UK Science and Technology Facilities Council; ERC Consolidator; National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP); NSERC; JST ERATO
Grant/Contract Number:
SC0021176; SC0013365; SC0023175; AC05-00OR22725
OSTI ID:
3004116
Alternate ID(s):
OSTI ID: 2572463
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 134; ISSN 1079-7114; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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