Abstract
Properties of neutron-rich are studied using the mean-field approach with Skyrme energy density functionals. Its weak binding and large total reaction cross section, which are suggested by recent experiments, are simulated by modifying the central part of Skyrme potential. Calculating strength distribution by using the random-phase approximation, we investigate developments of low-lying electric dipole strength and the contribution of core excitations of . As the neutron Fermi level approaches the zero-energy threshold ( MeV), we find that the low-lying strength exceeds the energy-weighted cluster sum rule, which indicates the importance of core excitations with the orbit.
1 More- Received 20 January 2014
- Revised 30 April 2014
DOI:https://doi.org/10.1103/PhysRevC.89.064316
©2014 American Physical Society