Systematic study on α-decay half-lives of uranium isotopes with a screened electrostatic barrier  

作　　者：Yang-Yang Xu De-Xing Zhu You-Tian Zou Xi-Jun Wu Biao He Xiao-Hua Li 徐杨洋;祝德星;邹有甜;吴喜军;何彪;李小华(School of Nuclear Science and Technology,University of South China,Hengyang 421001,China;School of Math and Physics,University of South China,Hengyang 421001,China;College of Physics and Electronics,Central South University,Changsha 410083,China;National Exemplary Base for International Sci&Tech.Collaboration of Nuclear 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 Math and Physics,University of South China,Hengyang 421001,China [3]College of Physics and Electronics,Central South University,Changsha 410083,China [4]National Exemplary Base for International Sci&Tech.Collaboration of Nuclear Energy and Nuclear Safety,University of South China,Hengyang 421001,China [5]Cooperative Innovation Center for Nuclear Fuel Cycle Technology&Equipment,University of South China,Hengyang 421001,China [6]Key Laboratory of Low Dimensional Quantum Structures and Quantum Control,Hunan Normal University,Changsha 410081,China

出　　处：《Chinese Physics C》2022年第11期212-220,共9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);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(ZR2019YQ01);the Hunan Provincial Innovation Foundation For Postgraduate(CX20210942);the Opening Project of Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment,University of South China(2019KFZ10)。

摘　　要：In the present work,we systematically study the α-decay half-lives of uranium(Z=92) isotopes based on the Gamow model with a screened electrostatic barrier.There are only two adjustable parameters in our model i.e.the parameter g and the screening parameter t in the Hulthen potential for considering the screened electrostatic effect of the Coulomb potential.The calculated results are in good agreement with experimental data,and the corresponding root-mean-square(rms) deviations of uranium isotopes with α transition orbital angular momentum l=0 and l=2 are 0.141 and 0.340,respectively.Moreover,we extend this model to predict α-decay half-lives of uranium isotopes whose a decay is energetically allowed or observed but not yet quantified in NUBASE2020.For comparison,the modified Hatsukawa formula(XLZ),the unified Royer formula(DZR),the universal decay law(UDL) and the Viola-Seaborg-Sobiczewski formula(VSS) are also used.The predictions are basically consistent with each other.Meanwhile,the results also indicate that N=126 shell closure is still robust at Z=92 and the spectroscopic factor S_(α) is almost the same for uranium isotopes with the same l.

关 键 词：αdecay HALF-LIFE Gamow model screened electrostatic barrier 

分 类 号：O571.3[理学—粒子物理与原子核物理]