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Superdeformed Bands with ΔI = 4 Bifurcation of the Odd-A Nuclei in the A ～ 190 Region |
| LIU Yu-Xin1,2,3,4;ZHOU Jian-Hang1;WANG Jia-Jun1 |
| 1Department of Physics, Peking University, Beijing 100871
2The Key Laboratory of Heavy Ion Physics, Ministry
of Education Laboratory, Beijing University, Beijing 100871
3Institute of Theoretical Physics, Chinese Academy
of Sciences, P. O. Box 2735, Beijing 100080
4Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
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| Cite this article: |
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LIU Yu-Xin, ZHOU Jian-Hang, WANG Jia-Jun 2001 Chin. Phys. Lett. 18 1319-1322 |
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Abstract The γ-ray energy (Eγ) spectra of the superdeformed(SD) bands of odd-A nuclei in the A ～ 190 mass region are investigated systematically. It is found that ΔI = 4 bifurcation exists in the SD bands. Within the supersymmetry scheme including many-body interactions and a perturbation possessing the SO(5) (or SU(5)) symmetry on the rotational symmetry, the Eγ spectra, dynamical moments of inertia and Eγ difference δ4Eγ(I) of these bands are evaluated. Quantitative good results are obtained. They show that the scheme is powerful to describe the ΔI = 4 bifurcation. The ΔI = 4 bifurcation may then come from the perturbation holding the SO(5) (or SU(5)) symmetry on the rotation. In a microscopic point of view, the ΔI = 4 bifurcation may be result from the combination among the β-phonon, γ-phonon and the rotation.
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| Keywords:
21.10.Re
21.60.Fw
23.20.Lv
27.80.+w
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Published: 01 October 2001
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