Giant halo in relativistic and non-relativistic approaches

Details Giant halo in relativistic and non-relativistic approaches Giant halo in relativistic and non-relativistic approaches

2006-03-03

arxiv.org/abs/nucl-th/0603005v1

Physics

Nuclear Physics

Nuclear Theory

11 pages, 13 figures

Scientific paper

The phenomena of giant halo and halo of neutron-rich even-Ca isotopes are investigated and compared in the framework of the relativistic continuum Hartree-Bogoliubov (RCHB) and non-relativistic Skyrme Hartree-Fock-Bogoliubov (HFB) calculations. With two parameter sets for each of the RCHB and the Skyrme HFB calculations, it is found that although halo phenomena exist for Ca isotopes near neutron drip line in both calculations, the halo of the Skyrme HFB calculations starts at a more neutron-rich nucleus than that of the RCHB calculations, and the RCHB calculations have larger neutron root-mean-square (rms) radii systematically in N >= 40 than those of the Skyrme HFB calculations. The former difference comes from difference in shell structure. The reasons for the latter can be partly explained by the neutron 3s1/2 orbit, which causes more than 50% of the difference among the four calculations for neutron rms radii at 66Ca.

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