超重核的基态性质

裴俊琛; 许甫荣; 吴哲英; 赵恩广

doi:10.11804/NuclPhysRev.20.02.116

超重核的基态性质

Ground-state Properties of Superheavy Nuclei

摘要

摘要: 用Skyrme Hartree Fock+BCS方法计算了超重核的基态性质,讨论了结合能、α衰变、形变、壳结构和自发裂变等问题.计算得到的结合能较好地反映了实验测量值,α衰变能与实验值符合很好.发现基本上有两种类型的超重核形变:在²⁷⁰108核附近的β2≈0.2的长椭球形变和在²⁹⁸114核附近的近球形形变.单粒子能级分布计算表明:在质子Z=108和中子N=162存在变形壳,在质子Z=114和中子N=184存在球形壳.用得到的α衰变能和Viola Seaborg公式估算了α衰变半寿命,能合理地符合实验测量值. The groundstate properties of superheavy nuclei are investigated using the SkyrmeHartreeFock model. The pairing correlation is treated by the BCS method with the pairing δ force. Binding energies, α decays, spontaneous fissions, shell structures and deformations are discussed. Our calculations reproduce experimential binding energies and α decay energies.It is found that superheavy nuclei can be grouped with two kinds of deformations: i) well deformed prolate shapes (β2≈0.2) around ²⁷⁰108...

Abstract: The groundstate properties of superheavy nuclei are investigated using the SkyrmeHartreeFock model. The pairing correlation is treated by the BCS method with the pairing δ force. Binding energies, α decays, spontaneous fissions, shell structures and deformations are discussed. Our calculations reproduce experimential binding energies and α decay energies.It is found that superheavy nuclei can be grouped with two kinds of deformations: i) well deformed prolate shapes (β2≈0.2) around ²⁷⁰108...

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