Effects of triaxial deformation on the fission barrier in the Z=118−120 nuclei  

作　　者：柴清祯 王佳利 刘星汉 Qing-Zhen Chai;Jia-Li Wang;Xing-Han Liu(Institute of Theoretical Physics,School of Sciences,Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]Institute of Theoretical Physics,School of Sciences,Henan University of Technology,Zhengzhou 450001,China

出　　处：《Communications in Theoretical Physics》2024年第6期92-101,共10页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.12205076 and 12047504);the China Postdoctoral Science Foundation(Grant No.2020M670012);the Launching Fund of Henan University of Technology(Grant No.2021BS047).

摘　　要：By using potential energy surface(PES)calculations in the three-dimensional space(β_(2),γ,β_(4))within the framework of the macroscopic-microscopic model,the fission trajectory and fission barrier for Z=118(Og),119,120 nuclei has been systematically investigated.The calculated PES includes macroscopic liquid-drop energy,microscopic shell correction and pairing correction.Taking the ^(294)Og176 nucleus as an example,we discuss the next closed shell after Z=82 and N=126 with the calculated Woods-Saxon single-particle levels.Then,the results of PES in ^(294)Og is illustrated from the(X,Y)scale to the(β_(2),γ)scale.Theγdegree of freedom reveals the shape evolution clearly during the fission process.The structure near the minimum and saddle point of the PES in the Z=118,119,120 nuclei is demonstrated simultaneously.Based on the potential energy curves,general trends of the evolution of the fission barrier heights and widths are also studied.The triaxial deformation in these superheavy mass regions plays a vital role in the first fission barrier,showing a significant reduction in both triaxial paths.In addition,the model-dependent fission barriers of proton-rich nuclei ^(295)Og,296119,and 297120 are analyzed briefly.Our studies could be valuable for synthesizing the superheavy new elements in the forthcoming HIAF and other facilities.

关 键 词：fission barrier potential energy surface calculation TRIAXIALITY Woods-Saxon potential superheavy new elements 

分 类 号：O571[理学—粒子物理与原子核物理]