通过镜像核的电荷半径估算核对称性能量的斜率

IF 1.7 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR
Sakshi Gautam , Anagh Venneti , Sarmistha Banik , B.K. Agrawal
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引用次数: 0

摘要

镜像核的电荷半径是通过哈特里-福克波哥留布夫近似的配对效应计算得出的。使用 40 种不同的 Skyrme 能量密度函数,对不同质量的镜核对的电荷半径差(ΔRch)和核对称性能量斜率(L)之间的相关性进行了检验。研究发现,ΔRch-L 相关性对密度函数的约束具有稳健性。我们观察到,ΔRch 和 L 在相对较重的原子对中比在较轻的原子对中显示出更好的相关性。利用现有的电荷半径测量数据,我们的计算对核对称能的斜率施加了-20 MeV ≤L≤ 55 MeV的约束,置信度为68%。这是一种中度软对称能,与 PREX-II 和 CREX 分别测量的 P208b 和 C48a 中子皮厚所显示的硬对称能和软对称能截然不同。我们的结果也与从中子星观测数据中获得的天体约束相一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Estimation of the slope of nuclear symmetry energy via charge radii of mirror nuclei

Charge radii of mirror nuclei are calculated by implementing pairing effects with the Hartree-Fock Bogoliubov approximation. Correlations between the difference of charge radii (ΔRch) and slope of nuclear symmetry energy (L) are examined for different mirror nuclei pairs of varying masses using 40 different Skyrme energy density functionals. ΔRchL correlations are found to be robust for the binding constraints imposed on density functionals. We observe that ΔRch and L show relatively better correlations in relatively heavier pairs than those obtained in the lighter pairs. Our calculations impose a constraint on the slope of nuclear symmetry energy as -20 MeV ≤L≤ 55 MeV with 68% confidence band using available measurements on charge radii. This is a moderately soft symmetry energy, in contrast to stiff and soft symmetry energy indicated by PREX-II and CREX measurements of neutron skin thickness in P208b and C48a, respectively. Our result is also in agreement with celestial constraints obtained from observational data for neutron stars.

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来源期刊
Nuclear Physics A
Nuclear Physics A 物理-物理:核物理
CiteScore
3.60
自引率
7.10%
发文量
113
审稿时长
61 days
期刊介绍: Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.
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