| 引用本文： |
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周厚兵,张苏苏,孙小军.A≈160质量区奇A核的形状演化效应[J].广西科学,2016,23(3):212-215. [点击复制]
- ZHOU Houbing,ZHANG Susu,SUN Xiaojun.Structure Evolution in Odd-A Nuclei Around A≈160[J].Guangxi Sciences,2016,23(3):212-215. [点击复制]
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| 摘要: |
| [目的]研究A≈160质量区奇A核高激发态的形状演化性质。[方法]基于来自National Nuclear Data Center的实验数据,采用修正后的E-Gamma Over Spin (E-GOS)曲线方法首次系统性地探讨了A≈160质量区奇A核处于高激发态的激发特性。[结果]提取得到的E-GOS曲线表明该质量区原子核的形变与未配对中子的组态密切相关,当核外价中子占据高j轨道时,随着角动量的增加将对核芯产生强大的形状驱动效应。此外,根据E-GOS曲线的变化特征,发现在Yb同位素的高自旋能级结构中存在明显的形状演化现象,即随着角动量的增加原子核的激发机制从振动逐渐演化为转动。[结论]在A≈160质量区奇A核中系统性地存在形状演化现象。 |
| 关键词: 奇A核 E-GOS曲线 形状演化 |
| DOI：10.13656/j.cnki.gxkx.20160713.015 |
| 投稿时间：2016-05-10修订日期：2016-06-09 |
| 基金项目:广西自然科学基金项目(2014GXNSFBA118013,2014GXNSFDA118003,2015GXNSFDA139004),国家自然科学基金项目(11465005,11505035),广西高等教育本科教学改革工程项目(2015JGA151)和广西师范大学博士科研启动基金项目资助。 |
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| Structure Evolution in Odd-A Nuclei Around A≈160 |
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ZHOU Houbing, ZHANG Susu, SUN Xiaojun
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| (College of Physical Science and Technology, Guangxi Normal University, Guilin, Guangxi, 541004, China) |
| Abstract: |
| [Objective] The paper aims at studying the structure evolution of the odd-A nuclei with A≈160 at high spin states.[Methods] Based on the experimental data from Nuclear Data Center National,the E-Gamma Over Spin(E-GOS)curves after correction were used firstly to investigate the structure evolution in the odd-A nuclei with A≈160 as a function of spin.[Results] The nuclear shape is closely related to the neutron configuration,and the polarizing effect would begin to influence the core as valence nucleons start to fill high j neutron orbitals with increasing spin.Furthermore,it is founded that there is a clear structure evolution at high spin states of Yb isotopes based on the E-GOS characteristics.Namely,the Yb isotopes display a vibrational character at low spins,whereas at higher spins they have a rotational pattern.[Conclusion] The phenomena of structure evolution were found in the odd-A nuclei with A≈160. |
| Key words: odd-A nuclei the E-GOS curve structure evolution |
