Investigation of octupole effects in superheavy nuclei with improved potential-energy-surface calculations  

作　　者：WANG HuaLei LIU HongLiang XU FuRong JIAO ChangFeng 

机构地区：[1]School of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China [2]School of Physics and Engineering,Zhengzhou University,Zhengzhou 450001,China [3]3Center of Theoretical Nuclear Physics,National Laboratory for Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China

出　　处：《Chinese Science Bulletin》2012年第15期1761-1764,共4页

基　　金：supported by the National Natural Science Foundation of China (10735010, 10805040 and 10975006);the China Postdoctoral Science Foundation (20110490228)

摘　　要：It has been found that high-order deformation (e.g.β6) can have important effects on the structures of superheavy nuclei. In the present work, we investigate octupole deformation effects on superheavy nuclei with an improved potential-energy-surface (PES) calculation by including reflection-asymmetric deformations in a space of (β2 ,β3 ,β4 , β5). The calculations give various deformations including highly deformed (β2 ≈ 0.4) and superdeformed (β2 ≈ 0.7) shapes. The octupole-deformation degree of freedom mainly affects the fission barrier beyond the second minimum of PES.It has been found that high-order deformation （e.g.β6） can have important effects on the structures of superheavy nuclei. In the present work, we investigate octupole deformation effects on superheavy nuclei with an improved potential-energy-surface （PES） calculation by including reflection-asymmetric deformations in a space of （β2, β3, β4,β5）. The calculations give various deformations including highly deformed （β2 ≈ 0.4） and superdeformed （β2 ≈ 0.7） shapes. The octupole-deformation degree of freedom mainly affects the fission barrier beyond the second minimum of PES.

关 键 词：超重核 势能面 计算 对称变形 八极形变 变形程度 PES 超形变 

分 类 号：O571.6[理学—粒子物理与原子核物理] O641.121[理学—物理]