Pairing correlations in nuclei on the neutron-drip line

Abstract

Paring correlations in weakly bound nuclei on the edge of neutron drip line is studied by using a three-body model. A density-dependent contact interaction is employed to calculate the ground state of halo nuclei ${}^6$He and ${}^{11}$Li, as well as a skin nucleus ${}^{24}$O. Dipole excitations in these nuclei are also studied within the same model. We point out that the di-neutron type correlation plays a dominant role in the halo nuclei ${}^6$He and ${}^{11}$Li having the coupled spin of the two neutrons $S$=0, while the correlation similar to the BCS type is important in ${}^{24}$O. Contributions of the spin $S$=1 and S=0 configurations are separately discussed in the low energy dipole excitations.

6 pages, 12 eps figures

References in corpus (9)

• Quantum Monte Carlo Calculations of $A\le 6$ Nuclei
• Realistic models of pion-exchange three-nucleon interactions
• Pairing and continuum effects in nuclei close to the drip line
• Di-neutron correlation and soft dipole excitation in medium mass neutron-rich nuclei near drip-line
• Pairing anti-halo effect
• Three-body halos. III. Effects of finite core-spin
• Three-body Coulomb breakup of 11Li in the complex scaling method
• Extended 9Li+n+n three-body model of 11Li with the pairing correlation in 9Li
• Role of virtual break-up of projectile in astrophysical fusion reactions

Cited by in corpus (92)

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• Structures and decay properties of extremely proton-rich nuclei ${}^{11,12}$O
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• Unveiling pairing anti-halo effect in odd-even staggering in reaction cross sections of weakly bound nuclei
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