Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (2): 22 doi: 10.1007/s41365-016-0174-7


Exploring the sensitivity of α-decay half-life to neutron skin thickness for nuclei around 208Pb

Niu Wan 1, Chang Xu 1, Zhong-Zhou Ren 1,2   

  1. 1.Department of Physics and Key Laboratory of Modern Acoustics, Institute of AcousticsNanjing University, Nanjing, China
    2.Center of Theoretical Nuclear PhysicsNational Laboratory of Heavy-Ion Accelerator,Lanzhou, China
  • Contact: Niu Wan
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (Nos. 11175085, 11235001, 11375086, and 11120101005), the 973 Program of China (No. 2013CB834400), the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and by the Open Project Program of the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China (No. Y5KF141CJ1).

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Niu Wan, Chang Xu, Zhong-Zhou Ren. Exploring the sensitivity of α-decay half-life to neutron skin thickness for nuclei around 208Pb.Nuclear Science and Techniques, 2017, 28(2): 22     doi: 10.1007/s41365-016-0174-7


Based on the newest experimentally extracted nuclear density distributions for double-magic nucleus \(^{208}\text {Pb}\) (Tarbert et al. in Phys Rev Lett 112:242502, 2014), the sensitivity of \(\alpha \)-decay half-life to nuclear skin thickness is explored in the vicinity of the shell closure region around \(^{208}\text {Pb}\), i.e., isotopes of \(Z=82\) and isotones of \(N=126\). With the two-parameter Fermi (2PF) density distributions and an analytically derived formula, the \(\alpha \)-decay half-life is found to be closely related to the magnitude of nuclear skin thickness. For \(\alpha \) decays to the \(Z=82\) isotopes, the \(\alpha \)-decay half-life is found to decrease with the increasing neutron skin thickness, while the opposite behavior is found for \(\alpha \) decays to the \(N=126\) isotones. Therefore, it could be a possible way to extract the nuclear skin thickness from measured \(\alpha \)-decay half-lives.

Key words: Density distribution, Neutron skin thickness, Density-dependent cluster model, α-decay half-life