标题： 有限温度下的电和磁$γ$射线强度函数 显示英文标题

标题： Electric and magnetic $γ$-ray strength functions at finite-temperature

摘要： 电荷交换流（$\gamma$流）强度函数（$\gamma$SF）对于理解原子核的电磁响应以及建模天体物理中的中子俘获率至关重要。 我们在相对论密度泛函理论框架内引入了对电偶极子（E1）和磁偶极子（M1）强度函数（$\gamma$SF）的微观描述，并包含了有限温度效应。 由于热效应引起的未屏蔽效应，在总电磁（$\gamma$SF）强度函数的低能区显示出显著的变化，这与Oslo方法近期得到的粒子-（$\gamma$）符合数据一致。 对高温核中电和磁对总（$\gamma$SF）贡献的研究表明，磁偶极子（M1）模式在低能区变得更加突出，这与零温下的情况不同。 This microscopic approach offers new insights into the interplay between E1 and M1 $\gamma$SFs at finite-temperature, and opens new perspectives for future studies of $(n,\gamma)$ reactions and nucleosynthesis in hot stellar environments. 显示英文摘要

摘要： The $\gamma$-ray strength function ($\gamma$SF) is essential for understanding the electromagnetic response in atomic nuclei and modeling astrophysical neutron capture rates. We introduced a microscopic description of both electric dipole (E1) and magnetic dipole (M1) $\gamma$SFs that includes finite-temperature effects within relativistic density functional theory. The temperature dependence of the total electromagnetic $\gamma$SFs shows significant modification in the low-energy region due to thermal unblocking effects, essential for agreement with recent particle-$\gamma$ coincidence data from the Oslo method. An investigation of the electric and magnetic contributions to the total $\gamma$SF in hot nuclei indicates that the M1 mode becomes more prominent in the low-energy region, different than what is known at zero temperature. This microscopic approach offers new insights into the interplay between E1 and M1 $\gamma$SFs at finite-temperature, and opens new perspectives for future studies of $(n,\gamma)$ reactions and nucleosynthesis in hot stellar environments.