近日，安徽大学的郭建友&刘泉及其研究团队取得一项新进展。经过不懈努力，他们利用变形相对论平均场理论探讨富中子钠同位素的基态性质。相关研究成果已于2024年4月15日在国际知名学术期刊《中国物理C》上发表。

本研究探讨了富中子钠同位素的基态特性，涵盖了双中子分离能、均方根半径以及质子和中子分布的四极矩等多个关键指标。此外，研究人员还关注了束缚态和共振态下的单粒子能级、中子密度分布以及形状等特征。在此过程中，他们特别关注了与这些同位素紧密相关的独特物理现象。

本研究采用了具有BCS配对的复杂动量表示的变形相对论平均场理论（DRMF-CMR-BCS），该理论成功模拟了真实物理中的共振态，为理解变形晕核提供了全新的视角。研究人员考虑了四种有效相互作用(NL3、NL3*、PK1和NLSH)来评估连续介质和变形效应对光晕结构的影响。对奇偶核^35-43Na的计算揭示了所选择的有效相互作用和考虑的共振态数的依赖性。费米表面附近的中子占据模式，特别是在轨道 1/2^-₃ 和 3/2^-₂，被确定为光晕形成的关键。这项研究为富中子钠同位素的密度分布、形状演化和结构提供了深入的见解，为核物理学领域的发展作出了重要贡献。

附：英文原文

Title: Exploration of the ground state properties of neutron-rich sodium isotopes using the deformed relativistic mean field theory in complex momentum representations with BCS pairings

Author: Yu-Xuan Luo, Quan Liu, Jian-You Guo

Issue&Volume: 2024-04-15

Abstract: This study explores the ground-state characteristics of neutron-rich sodium isotopes, encompassing two-neutron separation energies, root-mean-square radii, quadrupole moments of proton and neutron distributions, single-particle levels of bound and resonant states, and neutron density distributions and shapes. Simultaneously, special attention is paid to the distinctive physical phenomena associated with these isotopes. The deformed relativistic mean field theory in complex momentum representations with BCS pairings (DRMF-CMR-BCS) employed in our research provides resonant states with real physics, offering insights into deformed halo nuclei. Four effective interactions (NL3, NL3*, PK1, and NLSH) were considered to assess the influence of continuum and deformation effects on halo structures. Calculations for odd-even nuclei ^35–43Na revealed the dependence on the chosen effective interaction and number of considered resonant states. Neutron occupation patterns near the Fermi surface, particularly in orbitals 1/2^-₃ and 3/2^-₂, were determined to be crucial in halo formation. The study provided detailed insights into the density distributions, shape evolution, and structure of neutron-rich sodium isotopes, contributing valuably to the field of nuclear physics.

DOI: 10.1088/1674-1137/ad1fe3

Source: http://hepnp.ihep.ac.cn/article/doi/10.1088/1674-1137/ad1fe3