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基于HI-13串列加速器在束γ终端原子核激发态寿命测量的核结构研究

郑云 吴晓光 李广生 李聪博 陈启明 竺礼华 贺创业 郝昕 王烈林 姚顺和 刘颖 李立华 汪金龙 钟健 周文奎 邓利涛 朱宝吉

郑云, 吴晓光, 李广生, 李聪博, 陈启明, 竺礼华, 贺创业, 郝昕, 王烈林, 姚顺和, 刘颖, 李立华, 汪金龙, 钟健, 周文奎, 邓利涛, 朱宝吉. 基于HI-13串列加速器在束γ终端原子核激发态寿命测量的核结构研究[J]. 原子核物理评论, 2016, 33(4): 375-384. doi: 10.11804/NuclPhysRev.33.04.375
引用本文: 郑云, 吴晓光, 李广生, 李聪博, 陈启明, 竺礼华, 贺创业, 郝昕, 王烈林, 姚顺和, 刘颖, 李立华, 汪金龙, 钟健, 周文奎, 邓利涛, 朱宝吉. 基于HI-13串列加速器在束γ终端原子核激发态寿命测量的核结构研究[J]. 原子核物理评论, 2016, 33(4): 375-384. doi: 10.11804/NuclPhysRev.33.04.375
ZHENG Yun, WU Xiaoguangn, LI Guangsheng, LI Congbo, CHEN Qiming, ZHU Lihua, HE Chuangye, HAO Xin, WANG Lielin, YAO Shunhe, LIU Ying, LI Lihua, WANG Jinlong, ZHONG Jian, ZHOU Wenkui, DEN Litao, ZHU Baoji. Nuclear Structure Studies Based on the Lifetime Measurements of Excited States in Nuclei at the in-beam γ Terminal of HI-13 Tandem Accelerator[J]. Nuclear Physics Review, 2016, 33(4): 375-384. doi: 10.11804/NuclPhysRev.33.04.375
Citation: ZHENG Yun, WU Xiaoguangn, LI Guangsheng, LI Congbo, CHEN Qiming, ZHU Lihua, HE Chuangye, HAO Xin, WANG Lielin, YAO Shunhe, LIU Ying, LI Lihua, WANG Jinlong, ZHONG Jian, ZHOU Wenkui, DEN Litao, ZHU Baoji. Nuclear Structure Studies Based on the Lifetime Measurements of Excited States in Nuclei at the in-beam γ Terminal of HI-13 Tandem Accelerator[J]. Nuclear Physics Review, 2016, 33(4): 375-384. doi: 10.11804/NuclPhysRev.33.04.375

基于HI-13串列加速器在束γ终端原子核激发态寿命测量的核结构研究

doi: 10.11804/NuclPhysRev.33.04.375
基金项目: 国家自然科学基金资助项目(11305269,11375267,11475072,11405274,11205068,11175259)
详细信息
    作者简介:

    郑云(1981-),男,云南祥云人,副研究员,从事粒子物理与原子核物理研究;E-mail:Zhengyun@ciae.ac.cn

    通讯作者: 吴晓光,E-mail:wxg@ciae.ac.cn
  • 中图分类号: O571

Nuclear Structure Studies Based on the Lifetime Measurements of Excited States in Nuclei at the in-beam γ Terminal of HI-13 Tandem Accelerator

Funds: National Natural Science Foundation of China(11305269, 11375267, 11475072, 11405274, 11205068, 11175259)
  • 摘要: 利用在HI-13串列加速器的在束γ终端上建立的多普勒线移衰减法、反冲距离多普勒线移法和快时间延迟符合法等3种寿命测量方法,开展了原子核手征对称性、磁转动等核结构热点课题的研究工作。实验结果表明,130Cs的伙伴带具有很好的手征特性,而106Ag的候选带并非手征双带。根据测量的能级寿命提取的B(M1)值表明,106Ag的正宇称晕带和107Ag的正、负宇称晕带都具有典型的磁转动特性。此外,寿命测量数据还为解释和理解不同的同位素链中展现出的形状演化、形状共存、形状相变及临界点对称性等物理现象提供了有价值的实验证据。 


    The significance and principle of lifetime measurements of excited states in nuclei are briefly described. By using the recoil-distance Doppler-shift method, the Doppler-shift attenuation method, and the fast-timing technique established at the in-beam γ terminal of HI-13 tandem accelerator, nuclear structure studies on topical subjects including chiral symmetries and magnetic rotation have been performed. Our experimental results indicate that 130Cs shows better chiral characteristics, however, the two candidate bands of 106Ag could not be a pair of chiral doublet bands. For magnetic rotation, the deduced B(M1) values deduced from the measured level lifetimes clearly demonstrate that the yrast positive-parity band in 106Ag and both the yrast positiveand negative-parity bands in 107Ag are magnetic rotation bands. In addition, our lifetime measurement data also provide valuable experimental evidences for the interpretation and understanding of the shape evolution, the shape coexistence, and the critical-point symmetries of shape phase transition in the different isotope chains.
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  • 收稿日期:  2016-06-07
  • 修回日期:  2016-07-25
  • 刊出日期:  2016-12-20

基于HI-13串列加速器在束γ终端原子核激发态寿命测量的核结构研究

doi: 10.11804/NuclPhysRev.33.04.375
    基金项目:  国家自然科学基金资助项目(11305269,11375267,11475072,11405274,11205068,11175259)
    作者简介:

    郑云(1981-),男,云南祥云人,副研究员,从事粒子物理与原子核物理研究;E-mail:Zhengyun@ciae.ac.cn

    通讯作者: 吴晓光,E-mail:wxg@ciae.ac.cn
  • 中图分类号: O571

摘要: 利用在HI-13串列加速器的在束γ终端上建立的多普勒线移衰减法、反冲距离多普勒线移法和快时间延迟符合法等3种寿命测量方法,开展了原子核手征对称性、磁转动等核结构热点课题的研究工作。实验结果表明,130Cs的伙伴带具有很好的手征特性,而106Ag的候选带并非手征双带。根据测量的能级寿命提取的B(M1)值表明,106Ag的正宇称晕带和107Ag的正、负宇称晕带都具有典型的磁转动特性。此外,寿命测量数据还为解释和理解不同的同位素链中展现出的形状演化、形状共存、形状相变及临界点对称性等物理现象提供了有价值的实验证据。 


The significance and principle of lifetime measurements of excited states in nuclei are briefly described. By using the recoil-distance Doppler-shift method, the Doppler-shift attenuation method, and the fast-timing technique established at the in-beam γ terminal of HI-13 tandem accelerator, nuclear structure studies on topical subjects including chiral symmetries and magnetic rotation have been performed. Our experimental results indicate that 130Cs shows better chiral characteristics, however, the two candidate bands of 106Ag could not be a pair of chiral doublet bands. For magnetic rotation, the deduced B(M1) values deduced from the measured level lifetimes clearly demonstrate that the yrast positive-parity band in 106Ag and both the yrast positiveand negative-parity bands in 107Ag are magnetic rotation bands. In addition, our lifetime measurement data also provide valuable experimental evidences for the interpretation and understanding of the shape evolution, the shape coexistence, and the critical-point symmetries of shape phase transition in the different isotope chains.

English Abstract

郑云, 吴晓光, 李广生, 李聪博, 陈启明, 竺礼华, 贺创业, 郝昕, 王烈林, 姚顺和, 刘颖, 李立华, 汪金龙, 钟健, 周文奎, 邓利涛, 朱宝吉. 基于HI-13串列加速器在束γ终端原子核激发态寿命测量的核结构研究[J]. 原子核物理评论, 2016, 33(4): 375-384. doi: 10.11804/NuclPhysRev.33.04.375
引用本文: 郑云, 吴晓光, 李广生, 李聪博, 陈启明, 竺礼华, 贺创业, 郝昕, 王烈林, 姚顺和, 刘颖, 李立华, 汪金龙, 钟健, 周文奎, 邓利涛, 朱宝吉. 基于HI-13串列加速器在束γ终端原子核激发态寿命测量的核结构研究[J]. 原子核物理评论, 2016, 33(4): 375-384. doi: 10.11804/NuclPhysRev.33.04.375
ZHENG Yun, WU Xiaoguangn, LI Guangsheng, LI Congbo, CHEN Qiming, ZHU Lihua, HE Chuangye, HAO Xin, WANG Lielin, YAO Shunhe, LIU Ying, LI Lihua, WANG Jinlong, ZHONG Jian, ZHOU Wenkui, DEN Litao, ZHU Baoji. Nuclear Structure Studies Based on the Lifetime Measurements of Excited States in Nuclei at the in-beam γ Terminal of HI-13 Tandem Accelerator[J]. Nuclear Physics Review, 2016, 33(4): 375-384. doi: 10.11804/NuclPhysRev.33.04.375
Citation: ZHENG Yun, WU Xiaoguangn, LI Guangsheng, LI Congbo, CHEN Qiming, ZHU Lihua, HE Chuangye, HAO Xin, WANG Lielin, YAO Shunhe, LIU Ying, LI Lihua, WANG Jinlong, ZHONG Jian, ZHOU Wenkui, DEN Litao, ZHU Baoji. Nuclear Structure Studies Based on the Lifetime Measurements of Excited States in Nuclei at the in-beam γ Terminal of HI-13 Tandem Accelerator[J]. Nuclear Physics Review, 2016, 33(4): 375-384. doi: 10.11804/NuclPhysRev.33.04.375
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