arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1404.2695nucl-th
收藏

核表面的热性质

Thermal properties of the nuclear surface

B. K. Agrawal, D. Bandyopadhyay, J. N. De, S. K. Samaddar

摘要:

研究了半无限核物质和有限核的核表面的热力学势能、熵和对称自由能等热力学性质的热演化。本文采用的模型为B-Fermi模型。三个Skyrme相互作用,即SkM $^*$,SLy 4和SK 255用于计算来衡量核表面性质的能量密度泛函的依赖性。对于有限的原子核,表面观测值是从一个全球性的液滴启发适合的能量和自由能的主机覆盖整个周期表的核计算。热核系统是在一个减去的费米子-费米子框架中建模的。与半无限核物质相比,有限核的表面对称能发生了很大的变化,但两个系统的表面热力学势能相差不大。给出了半无限核物质表面热力学势与温度和非对称性的关系以及有限核表面自由能与温度的关系的解析表达式。

英文摘要:

The thermal evolution of a few thermodynamic properties of the nuclear surface like its thermodynamic potential energy, entropy and the symmetry free energy are examined for both semi-infinite nuclear matter and finite nuclei. The Thomas-Fermi model is employed. Three Skyrme interactions, namely, SkM$^*$, SLy4 and SK255 are used for the calculations to gauge the dependence of the nuclear surface properties on the energy density functionals. For finite nuclei, the surface observables are computed from a global liquid-drop inspired fit of the energies and free energies of a host of nuclei covering the entire periodic table. The hot nuclear system is modelled in a subtracted Thomas-Fermi framework. Compared to semi-infinite nuclear matter, substantial changes in the surface symmetry energy of finite nuclei are indicated; surface thermodynamic potential energies for the two systems are, however, not too different. Analytic expressions to fit the temperature and asymmetry dependence of the surface thermodynamic potential of semi-infinite nuclear matter and the temperature dependence of the surface free energy of finite nuclei are given.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑