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

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By using potential energy surface(PES)calculations in the three-dimensional space(β2,γ,β4)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 294Og176 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 294Og is illustrated from the(X,Y)scale to the(β2,γ)scale.The γ degree 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 nuclei295Og,296119,and297120 are analyzed briefly.Our studies could be valuable for synthesizing the superheavy new elements in the forthcoming HIAF and other facilities.

fission barrierpotential energy surface calculationtriaxialityWoods-Saxon potentialsuperheavy new elements

柴清祯、王佳利、刘星汉

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Institute of Theoretical Physics,School of Sciences,Henan University of Technology,Zhengzhou 450001,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationLaunching Fund of Henan University of Technology

12205076120475042020M6700122021BS047

2024

10.1088/1572-9494/ad3b8e

理论物理通讯(英文版)
中国科学院理论物理研究所 中国物理学会

理论物理通讯(英文版)

CSTPCD
影响因子：0.333
ISSN：0253-6102
年,卷(期)：2024.76(6)