Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-04-21
Eur.Phys.J.A37:343-355,2008
Physics
Nuclear Physics
Nuclear Theory
13 pages, 13 figures
Scientific paper
10.1140/epja/i2008-10633-3
The collective ground-state correlations stemming from low-lying quadrupole excitations are computed microscopically. To that end, the self-consistent mean-field model is employed on the basis of the Skyrme-Hartre-Fock (SHF) functional augmented by BCS pairing. The microscopic-macroscopic mapping is achieved by quadrupole-constrained mean-field calculations which are processed further in the generator-coordinate method (GCM) at the level of the Gaussian overlap approximation (GOA). We study the correlation effects on energy, charge radii, and surface thickness for a great variety of semi-magic nuclei. A key issue is to work out the influence of variations of the SHF functional. We find that collective ground-state correlations (GSC) are robust under change of nuclear bulk properties (e.g., effective mass, symmetry energy) or of spin-orbit coupling. Some dependence on the pairing strength is observed. This, however, does not change the general conclusion that collective GSC obey a general pattern and that their magnitudes are rather independent of the actual SHF parameters.
Erler Jens
Klüpfel P.
Maruhn Joachim A.
Reinhard Paul-Gerhard
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