α-decay properties of superheavy nuclei with 117 ≤ Z ≤ 120 from the systematics of decay chains and isotopic chains  

作　　者：万涛 唐树林 钱以斌 Tao Wan;Shu-Lin Tang;Yi-Bin Qian(Department of Applied Physics and MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]Department of Applied Physics and MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing,Nanjing University of Science and Technology,Nanjing 210094,China

出　　处：《Chinese Physics C》2024年第3期118-125,共8页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China (12075121),the Natural Science Foundation of Jiangsu Province (BK20190067),and the Fundamental Research Funds for the Central Universities (30922010312)。

摘　　要：Recently, the synthesis of new elements above Z = 118 has been a hot topic in nuclear physics. Meanwhile, the α-decay chain is expected to be the unique tool to identify these heaviest nuclei. We have systematically calculated the α-decay energies and half-lives on the same footing for superheavy nuclei (SHN) within the cluster model along with a slightly modified Woods-Saxon (W.S.) potential as the nuclear potential. Based on the available experimental data, the key radius parameter (R) in the α-core potential is determined via the systematic trend from the α-decay and isotopic chains. The α-decay energy (Qα) values and half-lives are then obtained simultaneously for those unknown SHN in the range of 117 ≤ Z ≤ 120, during which the decay width is obtained using a new treatment for the asymptotic behavior of the α-core wave function. The theoretical values and experimental data are found to be in excellent agreement for the nuclei ^(293,294)117 and ^(294)118 regardless of the method used to determine the R parameter. Predicting the α-decay chains for new elements Z = 119 and Z = 120 can be useful in ongoing or forthcoming experiments.

关 键 词：superheavy nuclei αdecay decay chains isotopic chains 

分 类 号：O571.321[理学—粒子物理与原子核物理]