AI 中文总结
本研究在核统计平衡框架内，探究核滴线对超新星物质重子组成的影响，发现低质子分数及高密度下纳入滴线外原子核会增强极富中子轻集团形成，该效应需纳入超新星建模与核合成研究。
AI 中文摘要
核滴线在确定极端天体物理条件下的物质组成方面发挥着关键作用。在核心坍缩超新星和中子星壳层中，物质被驱动至远离饱和密度和核稳定的状态；原子核与自由中子海共存，这种效应即使在中子星壳层的零温度下也存在，且在温度更高、富含中子的超新星环境中更为显著。这使得对滴线物理的仔细处理对于真实描述物态方程和组成至关重要。本研究在核统计平衡（NSE）框架内，探究了核滴线对超新星物质重子组成的影响。在有限温度和全局亚饱和密度下，组成以自由核子、轻集团和重原子核的形式进行评估。结果表明，在低质子分数和较高密度下，纳入滴线之外的原子核会增强极富中子轻集团的形成，导致自由中子密度和重原子核电荷分数显著降低。这些发现表明，滴线物理对超新星物质的组成具有显著影响，应被仔细纳入超新星建模和核合成研究中。
英文摘要
The nuclear drip line plays a crucial role in determining the composition of matter under extreme astrophysical conditions. In core-collapse supernovae and neutron-star crusts, matter is driven far from saturation density and nuclear stability; nuclei coexist with a sea of free neutrons, an effect that is present even at zero temperature in neutron-star crusts and becomes more pronounced in the hotter, neutron-rich supernova environment. This makes a careful treatment of drip-line physics essential for a realistic description of the equation of state and composition. In this work, the influence of the nuclear drip line on the baryonic composition of supernova matter is investigated within the framework of nuclear statistical equilibrium (NSE). The composition is evaluated in terms of free nucleons, light clusters, and heavy nuclei at finite temperature and global sub-saturation densities. The results indicate that, at low proton fractions and higher densities, the inclusion of nuclei beyond the drip line enhances the formation of extremely neutron-rich light clusters, leading to a significant reduction in the free-neutron density and the charge fraction of heavy nuclei. These findings demonstrate that drip-line physics has a significant impact on the composition of supernova matter and should be carefully incorporated in supernova modeling and nucleosynthesis studies.
Comments11 pages, 14 figures
Journal refPhys. Rev. C 114, 025803 (2026)
