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r-过程路径核β--衰变半衰期的估算

周勇 李志宏 陈永寿 王友宝 苏俊 郭冰 柳卫平

周勇, 李志宏, 陈永寿, 王友宝, 苏俊, 郭冰, 柳卫平. r-过程路径核β--衰变半衰期的估算[J]. 原子核物理评论, 2017, 34(3): 425-430. doi: 10.11804/NuclPhysRev.34.03.425
引用本文: 周勇, 李志宏, 陈永寿, 王友宝, 苏俊, 郭冰, 柳卫平. r-过程路径核β--衰变半衰期的估算[J]. 原子核物理评论, 2017, 34(3): 425-430. doi: 10.11804/NuclPhysRev.34.03.425
ZHOU Yong, LI Zhihong, CHENG Yongshou, WANG Youbao, SU Jun, GUO Bing, LIU Weiping. Estimate of β--decay Half-lives for r-process Nuclei[J]. Nuclear Physics Review, 2017, 34(3): 425-430. doi: 10.11804/NuclPhysRev.34.03.425
Citation: ZHOU Yong, LI Zhihong, CHENG Yongshou, WANG Youbao, SU Jun, GUO Bing, LIU Weiping. Estimate of β--decay Half-lives for r-process Nuclei[J]. Nuclear Physics Review, 2017, 34(3): 425-430. doi: 10.11804/NuclPhysRev.34.03.425

r-过程路径核β--衰变半衰期的估算

doi: 10.11804/NuclPhysRev.34.03.425
基金项目: 国家自然科学基金资助项目(11321064)
详细信息
    作者简介:

    周勇(1992-),男,四川广安人,硕士研究生,从事粒子物理与原子核物理研究;E-mail:zhouyx@foxmail.com

  • 中图分类号: O571.22

Estimate of β--decay Half-lives for r-process Nuclei

Funds: National Natural Science Foundation of China(11321064)
  • 摘要: 分析了20 < A < 190范围内丰中子核β衰变的实验数据,根据半衰期随质子数、中子数以及衰变能变化所呈现的壳效应和对效应等特点,提出了一种有效估算丰中子核β衰变寿命的公式。新的计算公式形式简单包含了较少的参数、计算量小。用该公式能较为准确地再现丰中子核的β衰变半衰期。用RIKEN最新测量丰中子核半衰期检验了该公式的外推能力,本工作可以为r-过程研究提供可靠的输入数据。


    Experimental data of the β--decay half-lives for the nuclei with atomic number between 20 and 190 are investigated. We have systematically studied the shell effects and pairing effects on β--decay half-lives versus the decay energy Q and nucleon numbers (Z, N). An empirical formula has been proposed to calculate the β--decay half-lives of neutron-rich nuclei. The empirical formula is simple and has relatively few parameters. Experimental β--decay half-lives of the neutron-rich nuclei are well reproduced by the new formula. In addition, the extrapolating capacity of this formula has been checked with the very recent experimental data from RIKEN. The predicted half-lives for r-process relevant nuclei with the current formula can be served as the reliable input of r-process model calculations.
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出版历程
  • 收稿日期:  2016-12-09
  • 修回日期:  2017-05-12
  • 刊出日期:  2017-07-18

r-过程路径核β--衰变半衰期的估算

doi: 10.11804/NuclPhysRev.34.03.425
    基金项目:  国家自然科学基金资助项目(11321064)
    作者简介:

    周勇(1992-),男,四川广安人,硕士研究生,从事粒子物理与原子核物理研究;E-mail:zhouyx@foxmail.com

  • 中图分类号: O571.22

摘要: 分析了20 < A < 190范围内丰中子核β衰变的实验数据,根据半衰期随质子数、中子数以及衰变能变化所呈现的壳效应和对效应等特点,提出了一种有效估算丰中子核β衰变寿命的公式。新的计算公式形式简单包含了较少的参数、计算量小。用该公式能较为准确地再现丰中子核的β衰变半衰期。用RIKEN最新测量丰中子核半衰期检验了该公式的外推能力,本工作可以为r-过程研究提供可靠的输入数据。


Experimental data of the β--decay half-lives for the nuclei with atomic number between 20 and 190 are investigated. We have systematically studied the shell effects and pairing effects on β--decay half-lives versus the decay energy Q and nucleon numbers (Z, N). An empirical formula has been proposed to calculate the β--decay half-lives of neutron-rich nuclei. The empirical formula is simple and has relatively few parameters. Experimental β--decay half-lives of the neutron-rich nuclei are well reproduced by the new formula. In addition, the extrapolating capacity of this formula has been checked with the very recent experimental data from RIKEN. The predicted half-lives for r-process relevant nuclei with the current formula can be served as the reliable input of r-process model calculations.

English Abstract

周勇, 李志宏, 陈永寿, 王友宝, 苏俊, 郭冰, 柳卫平. r-过程路径核β--衰变半衰期的估算[J]. 原子核物理评论, 2017, 34(3): 425-430. doi: 10.11804/NuclPhysRev.34.03.425
引用本文: 周勇, 李志宏, 陈永寿, 王友宝, 苏俊, 郭冰, 柳卫平. r-过程路径核β--衰变半衰期的估算[J]. 原子核物理评论, 2017, 34(3): 425-430. doi: 10.11804/NuclPhysRev.34.03.425
ZHOU Yong, LI Zhihong, CHENG Yongshou, WANG Youbao, SU Jun, GUO Bing, LIU Weiping. Estimate of β--decay Half-lives for r-process Nuclei[J]. Nuclear Physics Review, 2017, 34(3): 425-430. doi: 10.11804/NuclPhysRev.34.03.425
Citation: ZHOU Yong, LI Zhihong, CHENG Yongshou, WANG Youbao, SU Jun, GUO Bing, LIU Weiping. Estimate of β--decay Half-lives for r-process Nuclei[J]. Nuclear Physics Review, 2017, 34(3): 425-430. doi: 10.11804/NuclPhysRev.34.03.425
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