α-particle preformation factors in heavy and superheavy nuclei  

作　　者：骆松 张冬萌 亓林静 陈勋 初鹏程 李小华 Song Luo;Dong-Meng Zhang;Lin-Jing Qi;Xun Chen;Peng-Cheng Chu;Xiao-Hua Li(School of Nuclear Science and Technology,University of South China,Hengyang 421001,China;School of Mathematics and Physics,Qingdao University of Science and Technology,Qingdao 266033,China;National Exemplary Base for International Sci&Tech.Collaboration of Energy and Nuclear Safety,University of South China,Hengyang 421001,China;Cooperative Innovation Center for Nuclear Fuel Cycle Technology&Equipment,University of South China,Hengyang 421001,China;Key Laboratory of Low Dimensional Quantum Structures and Quantum Control,Hunan Normal University,Changsha 410081,China)

机构地区：[1]School of Nuclear Science and Technology,University of South China,Hengyang 421001,China [2]School of Mathematics and Physics,Qingdao University of Science and Technology,Qingdao 266033,China [3]National Exemplary Base for International Sci&Tech.Collaboration of Energy and Nuclear Safety,University of South China,Hengyang 421001,China [4]Cooperative Innovation Center for Nuclear Fuel Cycle Technology&Equipment,University of South China,Hengyang 421001,China [5]Key Laboratory of Low Dimensional Quantum Structures and Quantum Control,Hunan Normal University,Changsha 410081,China

出　　处：《Chinese Physics C》2024年第4期146-158,共13页中国物理C（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China (12175100, 11975132);the Construct Program of the Key Discipline in Hunan Province;the Research Foundation of Education Bureau of Hunan Province,China (21B0402, 18A237, 22A0305);the Natural Science Foundation of Hunan Province,China(2018JJ2321);the Innovation Group of Nuclear and Particle Physics in USC;the Shandong Province Natural Science Foundation,China (ZR2022JQ04);the Opening Project of Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment,University of South China (2019KFZ10);Hunan Provincial Innovation Foundation for Postgraduate (CX20230962).

摘　　要：In this study,α-particle preformation factors in heavy and superheavy nuclei from ^(220)Th to ^(294)Og are investigated.By combing experimental α decay energies and half-lives,the α-particle preformation factors P_(α) are extracted from the ratios between theoretical α decay half-lives calculated using the Two-Potential Approach (TPA)and experimental data.We find that the α-particle preformation factors exhibit a noticeable odd-even staggering behavior,and unpaired nucleons inhibit α-particle preformation.Moreover,we find that both the α decay energy and mass number of parent nucleus exhibit considerable regularity with the extracted experimental α-particle preformation factors.After considering the major physical factors,we propose a local phenomenological formula with only five valid parameters for α-particle preformation factors P_(α).This analytic expression has a clear physical meaning as well as good precision.As an application,this analytic formula is extended to estimate the α-particle preformation factors and further predict the α decay half-lives for unknown even-even nuclei with Z=118 and 120.

关 键 词：αdecay HALF-LIVES preformation factors heavy and superheavy nuclei 

分 类 号：O571[理学—粒子物理与原子核物理]