Relativistic Hartree+Bogoliubov description of the deformed N=28 region

G. A. Lalazissis, D. Vretenar, P. Ring, M. Stoitsov, and L. M. Robledo
Phys. Rev. C 60, 014310 – Published 16 June 1999
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Abstract

Ground-state properties of neutron-rich N28 nuclei are described in the framework of relativistic Hartree plus Bogoliubov (RH+B) theory. The model uses the NL3 effective interaction in the mean-field Lagrangian, and describes pairing correlations by the pairing part of the finite range Gogny interaction D1S. Two-neutron separation energies and ground-state quadrupole deformations that result from fully self-consistent RH+B solutions are compared with available experimental data. The model predicts a strong suppression of the spherical N=28 shell gap for neutron-rich nuclei: the 1f7/2fp core breaking results in deformed ground states. Shape coexistence is expected for neutron-rich Si, S, and Ar isotopes.

  • Received 8 July 1998

DOI:https://doi.org/10.1103/PhysRevC.60.014310

©1999 American Physical Society

Authors & Affiliations

G. A. Lalazissis1, D. Vretenar1,2, P. Ring1, M. Stoitsov1,3, and L. M. Robledo4

  • 1Physik-Department der Technischen Universität München, D-85748 Garching, Germany
  • 2Physics Department, Faculty of Science, University of Zagreb, Croatia
  • 3Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia–1784, Bulgaria
  • 4Departamento de Física Teórica C-XI, Universidad Autónoma de Madrid, E-28049 Madrid, Spain

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Vol. 60, Iss. 1 — July 1999

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