铅以上核结团放射性再研究（英文）  

Cluster Radioactivity in Trans-lead Nuclei Reexamined

作　　者：钱以斌 任中洲[2,3] 

机构地区：[1]南京理工大学应用物理系,南京210094 [2]南京大学物理学院,南京210093 [3]同济大学物理科学与工程学院,上海200092

出　　处：《原子核物理评论》2017年第3期499-504,504+500-503,共6页Nuclear Physics Review

基　　金：Natural Science Foundation of China(11375086,11535004,11605089,11120101005);Natural Science Youth Fund of Jiangsu Province(BK20150762);Fundamental Research Funds for the Central Universities(30916011339)~~

摘　　要：在密度依赖的结团模型下重新研究了铅以上原子核的结团放射性。根据由核电荷半径以及中子皮厚度的实验数据所提炼的子核和结团密度分布,通过双折叠模型得到了关键的结团-核芯作用势。然后结合库仑波函数边界条件求解了结团-子核相对运动的薛定谔方程,以得到衰变宽度。和我们以往没有考虑子核和结团密度具体分布的计算结果相比,现在得到的结团放射性衰变宽度明显增大。另外,随着结团中心越来越高的密度压低,衰变宽度的计算值会减小。We revisit the cluster emission from trans-lead nuclei within the density dependent cluster model. According to the refined density distribution of daughter and cluster via the available experimental data on nuclear charge radii and neutron skin thickness, the crucial cluster-core potential is constructed by the double-folding model. Then the Schr¨odinger equation of the cluster-core relative motion is solved along the outgoing Coulomb wave function boundary condition to obtain the decay width. The present decay width of cluster radioactivity is clearly augmented as compared to our previous results without the specific concern of the density distribution of daughter and cluster. Moreover, the computed decay width reduces along with the increasingly depressed density in the cluster center.

关 键 词：结团放射性 核半径 中子皮 

分 类 号：O571.3[理学—粒子物理与原子核物理]