发表机构
Saha Institute of Nuclear Physics; Homi Bhabha National Institute; Variable Energy Cyclotron Centre（萨哈核物理研究所; 霍米·巴巴国立研究所; 变能回旋加速器中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究采用贝叶斯推断建模IVGDR性质，约束核对称能系数并研究其与偶极极化率、中子皮厚度的关联，为核天体物理计算提供重要输入。
AI 中文摘要
我们采用贝叶斯推断从基态上建立的同位旋矢量巨偶极共振（IVGDR）数据中提取质心能量和宽度。该IVGDR的性质通过明确纳入同位旋不对称性、核形变和壳修正等结构效应进行建模，所得参数化方案对球形核和轴向形变核的IVGDR系统学均以极高精度再现。随后，提取的IVGDR参数被用于约束核对称能的系数，发现其与近期核偶极极化率的测量结果吻合良好。此外，这些对称能系数被用于预测不同自洽平均场模型下的偶极极化率，并研究其与中子皮厚度的关联。本研究结果为核天体物理相关的辐射俘获过程大规模计算，以及深化对极端条件下天体物理场景的理解提供了重要输入。
英文摘要
We have employed Bayesian inference to extract the centroid energies and widths from the isovector giant dipole resonance (IVGDR) data for the IVGDR built on the ground states of nuclei.These IVGDR properties were modeled by explicitly incorporating the structural effects like isospin asymmetry, nuclear deformation and shell correction. The resulting parametrizations reproduce the IVGDR systematics with remarkable precision for both spherical and axially deformed nuclei. Subsequently, the extracted IVGDR parameters were used to constrain the coefficients of the nuclear symmetry energy, which are found to be in good agreement with recent measurements of nuclear dipole polarizability. Furthermore, these symmetry-energy coefficients were employed to predict the dipole polarizability within different self-consistent mean-field models and to investigate its correlation with the neutron-skin thickness. The present findings provide valuable input for large-scale calculations of radiative capture processes relevant to nuclear astrophysics and for improving our understanding of astrophysical scenarios under extreme conditions.
Comments11 pages and 12 figures
Journal refPhys. Rev. C 114, 044308 (2026)
