10/18
2023
Seminar
- Title题目 Deformation and spin-orbit splitting of Λ hypernuclei in the Skyrme-Hartree-Fock approach
- Speaker报告人 周先荣 （华东师范大学）
- Date日期 2023年10月18日 15:00
- Venue地点 北楼322
Abstract摘要
The breaking of spin symmetry (SS) in the single-particle (s.p.) levels of atomic nuclei, i.e., the quasidegeneracy between two s.p. states with quantum numbers (n,l,j=l-1/2) and (n,l,j=l+1/2), is of great importance to nuclear structure. The study of SS in hyperonic s.p. levels of hypernuclei is also an interesting topic that may help us further understand the hypernuclear structure and hyperon-nucleon interaction. In this talk, the realizations of spin symmetry in the hyperon spectra of hypernuclei ranging from light to heavy masses are discussed in the framework of the deformed Skyrme-Hartree-Fock approach. The effect of deformation on spin symmetry and its interplay with the required spin-orbit force is studied in detail. It is found that the spin symmetry prevails due to a small spin-orbit force. Moreover, for spin doublets with the same principal quantum number n, the reduced spin-orbit splitting Es.o. shows a good linear relation with respect to the quantum number l, even for a large N spin-orbit strength.
报告人简介：
周先荣，女，华东师范大学教务处处长/物理与电子科学学院教授。2002年博士毕业于中科院理论物理所。入选2007年度教育部新世纪人才支持计划。主要研究兴趣为超核结构，已在国际重要期刊Phys. Rev. Lett.等上发表SCI论文60多篇，已主持5项国家自然科学基金和1项上海市自然科学基金。获2022国家级教学成果奖一等奖1项、上海市教学成果奖特等奖1项、一等奖1项。
邀请人：
周善贵 研究员
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