TY - JOUR
T1 - Pairing correlations and soft dipole excitations in nuclei on the neutron-drip line
AU - Sagawa, H.
AU - Hagino, K.
N1 - Funding Information:
This work was supported by the Japanese Ministry of Education, Culture, Sports, Science, and Technology by Grant-in-Aid for Scientific Research under the program numbers (C(2)) 16540259 and 16740139.
PY - 2007/8
Y1 - 2007/8
N2 - 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.
AB - 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.
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U2 - 10.1134/S1063778807080017
DO - 10.1134/S1063778807080017
M3 - Article
AN - SCOPUS:34548463459
VL - 70
SP - 1321
EP - 1329
JO - Physics of Atomic Nuclei
JF - Physics of Atomic Nuclei
SN - 1063-7788
IS - 8
ER -