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

Abstract

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.

References in corpus (22)

• Mean-field description of ground-state properties of drip-line nuclei: Pairing and continuum effects
• Exotic modes of excitation in atomic nuclei far from stability
• Systematic study of deformed nuclei at the drip lines and beyond
• Coordinate-space solution of the Skyrme-Hartree-Fock-Bogolyubov equations within spherical symmetry. The program HFBRAD (v1.0)
• Pairing correlations in nuclei on the neutron-drip line
• Spatial structure of neutron Cooper pair in low density uniform matter
• Continuum Linear Response in Coordinate Space Hartree-Fock-Bogoliubov Formalism for Collective Excitations in Drip-line Nuclei
• Di-neutron correlation and soft dipole excitation in medium mass neutron-rich nuclei near drip-line
• Continuum quasiparticle random phase approximation and the time dependent Hartree-Fock-Bogoliubov approach
• Coexistence of BCS and BEC-like pair structures in halo nuclei
• Nuclear Skins and Halos in the Mean-Field Theory
• Pairing Interaction and Self-Consistent Densities in Neutron-Rich Nuclei
• Pairing anti-halo effect
• The halo of the exotic nucleus 11Li: a single Cooper pair
• Generic strong coupling behavior of Cooper pairs in the surface of superfluid nuclei
• Axially symmetric Hartree-Fock-Bogoliubov Calculations for Nuclei Near the Drip-Lines
• Strong dineutron correlation in 8He and 18C
• Collective excitations in the inner crust of neutron stars : supergiant resonances
• Three-body Coulomb breakup of 11Li in the complex scaling method
• Pairing collectivity in medium-mass neutron-rich nuclei near drip-line
• Nuclear vorticity and the low-energy nuclear response - Towards the neutron drip line
• Collective Properties of Low-lying Octupole Excitations in ${}_{82}^{208}P{b}_{126}$, ${}_{20}^{60}C{a}_{40}$ and ${}_8^{28}{O}_{20}$

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• Green's function method for the spin and pseudospin symmetries in the single-particle resonant states
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• Microscopic derivation of the Bohr-Mottelson collective Hamiltonian and its application to quadrupole shape dynamics
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