Theoretical predictions on cluster radioactivity of superheavy nuclei with Z=119,120  

作　　者：刘洁洁 王震 张涵韬 任中洲 Jiejie Liu;Zhen Wang;Hantao Zhang;Zhongzhou Ren(School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Advanced Micro-Structure Materials,Ministry of Education,Shanghai 200092,China)

机构地区：[1]School of Physics Science and Engineering,Tongji University,Shanghai 200092,China [2]Key Laboratory of Advanced Micro-Structure Materials,Ministry of Education,Shanghai 200092,China

出　　处：《Chinese Physics C》2024年第1期125-137,共13页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(12035011,11975167,11947211,11905103,11881240623,11961141003);the National Key R&D Program of China(2018YFA0404403)。

摘　　要：In this study,we investigate the cluster radioactivity(CR)of new superheavy elements with Z=119 and 120 based on two successful theoretical methods with modified parameters:the density-dependent cluster model(DDCM)and unified decay formula(UDF).First,we employ the DDCM and UDF to accurately reproduce the experimental half-lives of cluster emissions,which demonstrates the high reliability of our theoretical methods.Then,we systematically predict the probable cluster modes of ^(293-311)119 and ^(293-302)120 as well as their corresponding decay energies and half-lives.The half-lives of cluster decay derived from the DDCM are consistent with those from the UDF.Therefore,our results reveal that the cluster emission of ^(8)Be,emitted from the Z=119 and 120 isotopic chains,exhibits the minimum half-life for cluster emission,and hence,^(8)Be emission is considered the most probable cluster decay mode.Moreover,we explore the competition betweenαdecay and CR and find thatαdecay may be the dominant decay mode against CR.Furthermore,the good linear relationship between the decay energy and the number ofαparticles within the emitted cluster is extended to the range of superheavy nuclei(SHN).We anticipate that our theoretical predictions for CR will provide valuable references for the experimental synthesis of new SHN.

关 键 词：cluster radioactivity superheavy nuclei density-dependent cluster model 

分 类 号：O571[理学—粒子物理与原子核物理]