Collectivity of the low lying dipole strength in relativistic random phase approximation

Jan, 2001
29 pages
Published in:
  • Nucl.Phys.A 692 (2001) 496-517
e-Print:

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Abstract:
The relativistic random phase approximation is applied in the analysis of the evolution of the isovector dipole response in nuclei with a large neutron excess. The self-consistent framework of relativistic mean-field theory, which has been very successfully applied in the description of ground-state properties of nuclei far from the valley of β\beta-stability, is extended to study the possible onset of low-energy collective isovector dipole modes in nuclei with extreme isospin values.
Note:
  • 29 pages LaTeX, 14 eps figs, to appear in Nucl. Phys. A
  • 21.60.Jz
  • 24.30.Cz
  • 24.30.Gd
  • Relativistic random phase approximation
  • Relativistic mean-field model
  • Giant resonances
  • Pygmy resonances