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.
Similar content being viewed by others
References
G. F. Bertsch and H. Esbensen, Ann. Phys. (N.Y.) 209, 327 (1991).
H. Esbensen and G. F. Bertsch, Nucl. Phys. A 542, 310 (1992).
H. Esbensen, G. F. Bertsch and K. Hencken, Phys. Rev. C 56, 3054 (1997).
N. Vinh Mau and J. C. Pacheco, Nucl. Phys. A 607, 163 (1996).
A. Bonaccorso and N. VinhMau, Nucl. Phys. A 615, 245 (1997).
M. V. Zhukov et al., Phys. Rep. 231, 151 (1993).
D. V. Federov, E. Garrido, and A. S. Jensen, Phys. Rev. C 51, 3052 (1995).
B. S. Pudliner, V. R. Pandharipande, J. Carlson, and R. B. Wiringa, Phys. Rev. Lett. 74, 4396 (1995); S.C. Pieper,V. R. Pandharipande, R. B.Wiringa, and J.Carlson, Phys. Rev. C 64, 014001 (2001).
K. Hagino and H. Sagawa, Phys. Rev. C 72, 044321 (2005).
Yu. Ts. Oganessian, V. I. Zagrebaev, and J. S. Vaagen, Phys. Rev. Lett. 82, 4996 (1999); Phys. Rev. C 60, 044605 (1999).
K. Bennaceur, J. Dobaczewski, and M. Ploszajczak, Phys. Lett. B 496, 154 (2000).
H. Sagawa, N. Takigawa, and Nguyen van Giai, Nucl. Phys. A 543, 575 (1992).
C. A. Bertulani, G. Baur, and M. S. Hussein, Nucl. Phys. A 526, 751 (1991).
K. Hagino, M. S. Hussein, and A. B. Balantekin, Phys. Rev. C 68, 048801 (2003).
T. Aumann et al., Phys. Rev. C 59, 1252 (1999).
K. Ieki et al., Phys. Rev. Lett. 70, 730 (1993); S. Shimoura et al., Phys. Lett. B 348, 29 (1995); M. Zinser et al., Nucl. Phys. A 619, 151 (1997).
T. Nakamura et al., Phys. Rev. Lett. 96, 252502 (2006).
Author information
Authors and Affiliations
Corresponding author
Additional information
The text was submitted by the authors in English.
Rights and permissions
About this article
Cite this article
Sagawa, H., Hagino, K. Pairing correlations and soft dipole excitations in nuclei on the neutron-drip line. Phys. Atom. Nuclei 70, 1321–1329 (2007). https://doi.org/10.1134/S1063778807080017
Received:
Issue Date:
DOI: https://doi.org/10.1134/S1063778807080017