Revisiting the alpha-decay reduced width of the lightest uranium isotope 214U  

作　　者：Shuangshuang Zhang Yongjia Wang Xiaotao He 张双双;王永佳;贺晓涛(College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;School of Science,Huzhou University,Huzhou 313000,China)

机构地区：[1]College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]School of Science,Huzhou University,Huzhou 313000,China

出　　处：《Chinese Physics C》2025年第3期107-114,共8页中国物理C(英文版)

基　　金：Supported by the National Natural Science Foundation of China(12475121,U2032138);the National Key R&D Program of China(2023YFA1606503,2023YFA1606402,2024YFE0109804)。

摘　　要：The lightest uranium isotope^(214)U has been produced at the Heavy lon Research Facility in Lanzhou,China.The a-decay reduced width($2)of^(214)U has been found to be significantly larger than those of other nuclei by a factor of 2.However,the extraction ofσ^(2)depends on the penetration probability(P)through the barrier,and P is related to the theoretical method of obtaining it and the form of theα-core potential.The aim of this study is to investigate whether the selections of theα-core potential and the method of calculating P can affect the above conclusion.Four different phenomenological a-core potentials and two microscopic double-folding potentials,together with the Wentzel-Kramers-Brillouin(WKB)approximation and transfer matrix(TM)approach,are used to obtain P.The value of P obtained using the WKB approximation is about 20%-40%smaller than the one obtained using the TM approach.Thus,the deduced s2 is overestimated.The choice of a-core potential can significantly affect the value ofσ^(2).With the spherical form for theα-core potentials,theσ^(2)of^(214)U obtained with both the WKB and TM approaches are about twice as large as those of the surrounding nuclei.With the deformed double-folding potential,the ratio between 32 of^(214)U and that of the surrounding nuclei is observed to be slightly belowσ^(2).The effects of nuclear deformation and theα-core potential should be considered when studying theα-decay reduced width in the NpNn systematics.

关 键 词：alpha decay reduced width penetration probability 

分 类 号：O57[理学—粒子物理与原子核物理]