Abstract
Paring correlations in weakly bound nuclei on the edge of the neutron-drip line is studied by use of a three-body model. A density-dependent contact interaction is employed to calculate the ground state of halo nuclei and , as well as a skin nucleus . Dipole excitations in these nuclei are also studied within the same model. We point out that the dineutron-type correlation plays a dominant role in the halo nuclei and , having the coupled spin of the two neutrons , whereas the correlation similar to the BCS type is important in . Contributions of the spin and configurations are separately discussed in the low-energy dipole excitations.
- Received 29 August 2005
DOI:https://doi.org/10.1103/PhysRevC.72.044321
©2005 American Physical Society