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
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
摘要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.
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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2007, Vol. 24 
