| Isospin and F-spin symmetry structure in low-lying levels of 48，50Cr isotopes |
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| 引用本文： | 法列,龙桂鲁. Isospin and F-spin symmetry structure in low-lying levels of 48，50Cr isotopes[J]. 中国物理, 2004, 13(8): 1230-1238 |
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| 作者姓名： | 法列 龙桂鲁 |
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| 作者单位： | Department of Physics, Tsinghua University, Beijing 100084, China; Key Laboratory for Quantum Information and Measurements, MOE 100084, China;Department of Physics, Tsinghua University, Beijing 100084, China; Key Laboratory for Quantum Information and Measurements, MOE 100084, China; Centre of Nuclear Theory, Lanzhou Heavy Ion Accelerator National Laboratory, Lanzhou 730000, China; Institute of |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant Nos 10047001, 10325521), the Major State Basic Research Development Programme (Grant No G200077400) and the SRFDP programme of Education Ministry of China. |
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| 摘 要： | The low-energy level structure and electromagnetic transitions of ^48.50Cr nuclei have been studied using the interacting boson model with isospin (IBM-3). A sequence of isospin excitation bands with isospin T = Tz, Tz 1and Tz 2 has been assigned, and compared with available data. According to this study, the 2^3 and 2^2 states are the lowest mixed symmetry states in ^48Cr and ^50Cr, respectively. In particular, the present calculations suggest that a combination of isospin and F-spin excitation can explain the structure in these nuclei. The transition probabilities between the levels are analysed in terms of isoscalar and isovector decompositions which reveal the detailed nature of the energy levels. The results obtained are in good agreement with recent experimental data.
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| 关 键 词： | 同位旋结构 IBM-3 混合对称态 铬48-铬50同位素 原子物理学 |
| 收稿时间： | 2003-10-16 |
| 修稿时间： | 2004-04-03 |
Isospin and F-spin symmetry structure in low-lying levels of 48，50Cr isotopes |
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| Falih H. Al-Khudair and Long Gui-Lu. Isospin and F-spin symmetry structure in low-lying levels of 48，50Cr isotopes[J]. Chinese Physics, 2004, 13(8): 1230-1238 |
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| Authors: | Falih H. Al-Khudair and Long Gui-Lu |
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| Affiliation: | Department of Physics, Tsinghua University, Beijing 100084, China; Key Laboratory for Quantum Information and Measurements, MOE 100084, China; Department of Physics, Tsinghua University, Beijing 100084, China; Key Laboratory for Quantum Information and Measurements, MOE 100084, China; Centre of Nuclear Theory, Lanzhou Heavy Ion Accelerator National Laboratory, Lanzhou 730000, China; Institute of |
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| Abstract: | The low-energy level structure and electromagnetic transitions of {}^{48,50}Cr nuclei have been studied using the interacting boson model with isospin (IBM-3). A sequence of isospin excitation bands with isospin T=T_z, T_z+1 and T_z+2 has been assigned, and compared with available data. According to this study, the 2^+_3 and 2^+_2 states are the lowest mixed symmetry states in {}^{48}Cr and {}^{50}Cr, respectively. In particular, the present calculations suggest that a combination of isospin and F-spin excitation can explain the structure in these nuclei. The transition probabilities between the levels are analysed in terms of isoscalar and isovector decompositions which reveal the detailed nature of the energy levels. The results obtained are in good agreement with recent experimental data. |
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| Keywords: | IBM-3 isospin mixed symmetry states {}^{48 50}Cr isotopes |
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