| Original Articles |
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Structures of Light Neutron-Rich Nuclei with Orbit--Orbit Coupling |
| GUO Yan-Qing1;REN Zhong-Zhou 1,2 |
| 1Department of Physics, Nanjing University, Nanjing 2100082Center of Theoretical Nuclear Physics, National Laboratory of Heavy-Ion Accelerator at Lanzhou, Lanzhou 730000 |
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| Cite this article: |
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GUO Yan-Qing, REN Zhong-Zhou 2007 Chin. Phys. Lett. 24 652-655 |
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Abstract The properties of N=7, 8, 9 isotones with Z=4-8 are studied in the framework of the single-particle shell model. A tentative orbit--orbit coupling is introduced in the average nuclear potential. Calculations give a unified description of the
structures of N=7,8,9 isotones. The neutron level inversion in N=7 and N=9 isotones is discussed. The ground-state level inversion in 11Be and 15C is reproduced. The inversion between 2s 1/2 and 1d 5/2 neutron levels in 14B and 13Be is predicted. The possible halo structures in N=7 and N=9 isotones are analysed. The numerical results confirm the one-neutron halo structures in 11Be(2s 1/2), 11Be(1p 1/2), 12B(2s 1/2), 13C(2s1/2),14B(2s1/2) and 15C(2s1/2). The study implies that the attempt of considering orbit--orbit interaction in the shell model may be a feasible way to explain the anomalous
properties of exotic light nuclei.
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| Keywords:
21.60.Cs
21.10.Pc
21.10.Gv
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Received: 22 November 2006
Published: 08 February 2007
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| PACS: |
21.60.Cs
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(Shell model)
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21.10.Pc
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(Single-particle levels and strength functions)
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21.10.Gv
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(Nucleon distributions and halo features)
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