Pairing Correlations in halo Nuclei
Abstract
Paring correlations in weakly bound halo nuclei He and Li are studied by using a three-body model with a density-dependent contact interaction. We investigate the spatial structure of two-neutron wave function in a Borromean nucleus Li.The behavior of the neutron pair at different densities is simulated by calculating the two-neutron wave function at several distances between the core nucleus Li and the center of mass of the two neutrons. With this representation, a strong concentration of the neutron pair on the nuclear surface is quantitatively established for neutron-rich nuclei. Dipole excitations in He and Li are also studied within the same three-body model and compared with experimental data. The small open angles between the two neutrons from the core are extracted empirically by the B(E1) sum rule together with the rms mass radii, indicating the strong di-neutron correlation in the halo nuclei.
Cite
@article{arxiv.0709.1310,
title = {Pairing Correlations in halo Nuclei},
author = {H. Sagawa and K. Hagino},
journal= {arXiv preprint arXiv:0709.1310},
year = {2007}
}
Comments
8 pages 5, figures, Proceedins of International Symposium on Physics of Unstable Nuclei(Hoi An, Vietnam, 2007)