Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-03-22
Nucl.Phys.A786:31-46,2007
Physics
Nuclear Physics
Nuclear Theory
21 pages, 3 figures, accepted in Nuclear Physics A
Scientific paper
10.1016/j.nuclphysa.2007.01.087
Spectral distribution theory, which can be used to compare microscopic interactions over a broad range of nuclei, is applied in an analysis of two modern effective interactions based on the realistic CD-Bonn potential for $0\hbar\Omega$ no-core shell model calculations in the fp shell, as well as in a comparison of these with the realistic shell-model GXPF1 interaction. In particular, we explore the ability of these interaction to account for the development of isovector pairing correlations and collective rotational motion in the fp shell. Our findings expose the similarities of these two-body interactions, especially as this relates to their pairing and rotational characteristics. Further, the GXPF1 interaction is used to determine the strength parameter of a quadrupole term that can be used to augment an isovector-pairing model interaction with Sp(4) dynamical symmetry, which in turn is shown to yield reasonable agreement with the low-lying energy spectra of $^{58}$Ni and $^{58}$Cu.
Draayer Jerry P.
Sviratcheva Kristina D.
Vary James P.
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