Ground state properties and potential energy surfaces of 270Hs from multidimensionally-constrained relativistic mean field model

• 来源期刊: 中国科学:物理学 力学 天文学（英文版）
• 年，卷（期）: 2020,（1）
• 页码范围: 70-80
• 页数: 11页
• 语种: 英文

摘要

We study the ground state properties,potential energy curves and potential energy surfaces of the superheavy nucleus 270Hs by using the multidimensionally-constrained relativistic mean-field model with the effective interaction PC-PK 1.The binding energy,size and shape as well as single particle shell structure corresponding to the ground state of this nucleus are obtained.270Hs is well deformed and exhibits deformed doubly magic feature in the single neutron and proton level schemes.One-dimensional potential energy curves and two-dimensional potential energy surfaces are calculated for 270Hs with various spatial symmetries imposed.We investigate in detail the effects of the reflection asymmetric and triaxial distortions on the fission barrier and fission path of 270Hs.When the axial symmetry is imposed,the reflection symmetric and reflection asymmetric fission barriers both show a double-hump structure and the former is higher.However,when triaxial shapes are allowed the reflection symmetric barrier is lowered very much and then the reflection symmetric fission path becomes favorable.