Di-neutron correlation in soft octupole excitations of neutron-rich Ni isotopes beyond N=50

Details Di-neutron correlation in soft octupole excitations of neutron-rich Ni isotopes beyond N=50 Di-neutron correlation in soft octupole excitations of neutron-rich Ni isotopes beyond N=50

2008-09-08

arxiv.org/abs/0809.1291v1

Prog. Theor. Phys. 121 (2009), 97

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

10.1143/PTP.121.97

We investigate low-lying octupole response of neutron-rich Ni isotopes beyond the N=50 shell closure using the Skyrme-Hartree-Fock-Bogoliubov mean-fields and the continuum quasi-particle random phase approximation. Performing detailed numerical analyses employing the Skyrme parameter set SLy4 and a density-dependent delta interaction of the mixed type, we show that a neutron mode emerges above the neutron separation energy as a consequence of the weak binding of neutrons and it exhibits strong influences of the di-neutron correlation.

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