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Total β-Decay Energies of Nuclei Far from Stability: Evidence for the Wigner Symmetry Energy in Rb and Kr Masses

  • K. Aleklett
  • G. Nyman
  • E. Roeckl
  • L. Westgaard

Abstract

At the preceding Conference in this series, data from ISOLDE were presented [1] on total decay energies of medium- and high-A nuclei far from stability. We recall here the observation of a “ridge” in the mass surface, unaccounted for in the mass calculations, extending through several Z-values in the A ~ 180 region, 4–5 mass numbers to the proton-rich side of the valley of stability. In continued experiments at the CERN on-line isotope separator [2], similar low-resolution survey-tyRe measurements have been performed on proton-rich Kr and Br nuclei [3], and, more recently, on proton-rich isotopes of Rb and Cs, as well as neutron-rich nuclei in the Fr-Ra-Ac region [4]. In many cases it has been possible to go from mass differences to the atomic masses themselves, by connecting down through a decay chain to a nucleide of known mass.

Keywords

Symmetry Energy Nuclear Phys Nuclear Symmetry Energy Total Decay Energy Coulomb Displacement Energy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1976

Authors and Affiliations

  • K. Aleklett
    • 1
    • 2
    • 3
  • G. Nyman
    • 1
    • 4
  • E. Roeckl
    • 1
    • 4
  • L. Westgaard
    • 1
  1. 1.The ISOLDE CollaborationCERNGenevaSwitzerland
  2. 2.Chalmers University of TechnologyGothenburgSweden
  3. 3.Swedish Research Councils’ LaboratoryStudsvikSweden
  4. 4.Gesellschaft für Schwerionenforschung mbHDarmstadtGermany

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