| A Simple Systematical Law of E2＋ Values for Heavy Nuclei in the NpNn Scheme and the Evolution of the Z=64 Shell Gap |
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| 引用本文： | 樊哲勇,任中洲,许昌.A Simple Systematical Law of E2＋ Values for Heavy Nuclei in the NpNn Scheme and the Evolution of the Z=64 Shell Gap[J].中国物理快报,2007,24(9):2555-2558. |
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| 作者姓名： | 樊哲勇 任中洲 许昌 |
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| 作者单位： | [1]Department of Physics, Nanjing University, Nanjing 210008 [2]Center of Theoretical Nuclear Physics, National Laboratory of Heavy-Ion Accelerator, Lanzhou 730000 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10535010.
Z. Ren thanks Professor Y. M. Zhao for discussion. |
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| 摘 要： | A systematics of excitation energy of the first 2^＋ state E2＋ in even-even heavy nuclei （A ≥ 120） is studied in the NpNn scheme. It is found that a simple exponential function describes the dependence of E2＋ values on NpNn values very well. In addition, the Z = 64 shell gap is reexamined by investigating the systematics of the 52 ≤ Z ≤66 region. It is found that the Z = 64 shell gap is largest at N = 82 and becomes smMler with either increasing or decreasing of neutron numbers. The effects of this shell gap become negligible for counting the valence proton numbers when N ≥ 92 or N ≤ 72.
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| 关 键 词： | E2＋ 重原子核 NpNn Z=64 物理学 |
| 收稿时间： | 2007-5-15 |
| 修稿时间： | 2007-05-15 |
A Simple Systematical Law of E21+ Values for Heavy Nuclei in the NpNn Scheme and the Evolution of the Z=64 Shell Gap |
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| FAN Zhe-Yong,REN Zhong-Zhou,XU Chang.A Simple Systematical Law of E21+ Values for Heavy Nuclei in the NpNn Scheme and the Evolution of the Z=64 Shell Gap[J].Chinese Physics Letters,2007,24(9):2555-2558. |
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| Authors: | FAN Zhe-Yong REN Zhong-Zhou XU Chang |
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| Institution: | 1 Department of Physics, Nanjing University, Nanjing 210008; 2 Center of Theoretical Nuclear Physics, National Laboratory of Heavy-Ion Accelerator, Lanzhou 730000 |
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| Abstract: | |
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| Keywords: | 27 60 +j 27 70 +q 27 80 +w 27 90 +b |
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