Pairing correlations and soft dipole excitations in nuclei on the neutron-drip line

H. Sagawa, K. Hagino

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1 Citation (Scopus)

Abstract

Paring correlations and soft dipole excitations in weakly bound nuclei on the edge of neutrondrip line are studied by using a three-body model. A density-dependent contact interaction is employed to calculate the ground state of halo nuclei 6He and 11Li, as well as a skin nucleus 24O. 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 6He and 11Li having the coupled spin of the two neutrons S = 0, while the correlation similar to the BCS type is important in 24O. Contributions of the spin S = 1 and S = 0 configurations are separately discussed in the low-energy dipole excitations. The calculated results are compared with recent experimental data of 6He and 11Li.

Original languageEnglish
Pages (from-to)1321-1329
Number of pages9
JournalPhysics of Atomic Nuclei
Volume70
Issue number8
DOIs
Publication statusPublished - 2007 Aug

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

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