A microscopic estimate of the nuclear matter compressibility and symmetry energy in relativistic mean-field models

D. Vretenar, T. Nikšić, and P. Ring
Phys. Rev. C 68, 024310 – Published 18 August 2003
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Abstract

The relativistic mean-field plus random phase and quasiparticle random phase approximation calculations, based on effective Lagrangians with density-dependent meson-nucleon vertex functions, are employed in a microscopic analysis of the nuclear matter compressibility and symmetry energy. We compute the isoscalar monopole response of 90Zr, 116Sn, 144Sm, the isoscalar monopole and isovector dipoles response of 208Pb, and also the differences between the neutron and proton radii for 208Pb and several Sn isotopes. The comparison of the calculated excitation energies with the experimental data on the giant monopole resonances restricts the nuclear matter compression modulus of structure models based on the relativistic mean-field approximation to Knm250270MeV. The isovector giant dipole resonance in 208Pb and the available data on differences between the neutron and proton radii limit the range of the nuclear matter symmetry energy at saturation (volume asymmetry) of these effective interactions to 32MeV<~a4<~36MeV.

  • Received 12 February 2003

DOI:https://doi.org/10.1103/PhysRevC.68.024310

©2003 American Physical Society

Authors & Affiliations

D. Vretenar and T. Nikšić

  • Physics Department, Faculty of Science, University of Zagreb, Croatia
  • Physik-Department der Technischen Universität München, D-85748 Garching, Germany

P. Ring

  • Physik-Department der Technischen Universität München, D-85748 Garching, Germany

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Vol. 68, Iss. 2 — August 2003

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