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The Z = 82 shell closure in neutron-deficient Pb isotopes

  • M. Bender
  • T. Cornelius
  • G.A. Lalazissis
  • J.A. Maruhn
  • W. Nazarewicz
  • P.-G. Reinhard

Abstract:

Recent mass measurements show a substantial weakening of the binding-energy difference δ2p(Z, N) = E(Z - 2, N) - 2E(Z, N) + E(Z + 2, N) in the neutron-deficient Pb isotopes. As δ2p is often attributed to the size of the proton magic gap, it might be speculated that reduction in δ2p is related to a weakening of the spherical Z = 82 shell. We demonstrate that the observed trend is described quantitatively by self-consistent mean-field models in terms of deformed ground states of Hg and Po isotopes.

PACS. 21.10.Dr Binding energies and masses – 21.60.Jz Hartree-Fock and random-phase approximations – 27.70.+q 150 ?A? 189 – 27.80.+w 190 ?A? 219 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2002

Authors and Affiliations

  • M. Bender
    • 1
  • T. Cornelius
    • 2
  • G.A. Lalazissis
    • 3
  • J.A. Maruhn
    • 2
  • W. Nazarewicz
    • 5
  • P.-G. Reinhard
    • 4
  1. 1.Gesellschaft für Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt, GermanyDE
  2. 2.Institut für Theoretische Physik, Universität Frankfurt, Robert-Mayer-Strasse 8-10, D-60325 Frankfurt am Main, GermanyDE
  3. 3.Department of Theoretical Physics, Aristotle University of Thessaloniki, Gr-54006 Thessaloniki, GreeceGR
  4. 4.Joint Institute for Heavy-Ion Research, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831, USAUS
  5. 5.Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USAUS

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