Random-phase approximation based on relativistic point-coupling models

Details Random-phase approximation based on relativistic point-coupling models Random-phase approximation based on relativistic point-coupling models

2005-06-14

arxiv.org/abs/nucl-th/0506043v1

Phys.Rev. C72 (2005) 014312

Physics

Nuclear Physics

Nuclear Theory

24 pages, 4 figures, accepted for publication in Physical Review C

Scientific paper

10.1103/PhysRevC.72.014312

The matrix equations of the random-phase approximation (RPA) are derived for the point-coupling Lagrangian of the relativistic mean-field (RMF) model. Fully consistent RMF plus (quasiparticle) RPA illustrative calculations of the isoscalar monopole, isovector dipole and isoscalar quadrupole response of spherical medium-heavy and heavy nuclei, test the phenomenological effective interactions of the point-coupling RMF model. A comparison with experiment shows that the best point-coupling effective interactions accurately reproduce not only ground-state properties, but also data on excitation energies of giant resonances.

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