Nuclear Skins and Halos in the Mean-Field Theory

Details Nuclear Skins and Halos in the Mean-Field Theory Nuclear Skins and Halos in the Mean-Field Theory

1999-11-17

arxiv.org/abs/nucl-th/9911062v1

Phys.Rev. C61 (2000) 044326

Physics

Nuclear Physics

Nuclear Theory

22 RevTeX pages, 22 EPS figures included, submitted to Physical Review C

Scientific paper

10.1103/PhysRevC.61.044326

Nuclei with large neutron-to-proton ratios have neutron skins, which manifest themselves in an excess of neutrons at distances greater than the radius of the proton distribution. In addition, some drip-line nuclei develop very extended halo structures. The neutron halo is a threshold effect; it appears when the valence neutrons occupy weakly bound orbits. In this study, nuclear skins and halos are analyzed within the self-consistent Skyrme-Hartree-Fock-Bogoliubov and relativistic Hartree-Bogoliubov theories for spherical shapes. It is demonstrated that skins, halos, and surface thickness can be analyzed in a model-independent way in terms of nucleonic density form factors. Such an analysis allows for defining a quantitative measure of the halo size. The systematic behavior of skins, halos, and surface thickness in even-even nuclei is discussed.

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