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arXiv 1006.0489nucl-thastro-ph.SR
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核子和原子核维里展开中的核物质物态方程

Equation of State of nuclear matter in a Virial expansion of nucleons and nuclei

G. Shen, C. J. Horowitz, S. Teige

摘要:

研究了非理想气体维里展开下亚核密度下核物质的物态方程。该气体由中子、质子、α粒子和8980种原子核组成,其$A \ge 12$和质量来自有限射程液滴模型(FRDM)。在非常低的密度下,维里膨胀降低到核统计平衡。在更高的密度,维里的结果匹配顺利相对论平均场的结果在我们以前的文章中讨论。我们将在温度范围$T$ = 0.158至15.8 MeV,密度范围$n_B$ = 10 $^{-8}$至0.1 fm $^{-3}$,质子分数范围$Y_P$ = 0.05至0.56的73,000多个网格点处得到的EOS制成表格。在未来,我们计划将这些低密度的结果与我们早期的高密度平均场结果相匹配,并生成一个完整的EOS表,用于超新星和中子星合并模拟。该维里方程在低密度极限下是精确的。

英文摘要:

We study the equation of state (EOS) of nuclear matter at subnuclear density in a Virial expansion for a nonideal gas. The gas consists of neutrons, protons, alpha particles, and 8980 species of nuclei with $A \ge 12$ and masses from the finite-range droplet model (FRDM). At very low density, the Virial expansion reduces to nuclear statistical equilibrium. At higher density, the Virial results match smoothly to the relativistic mean field results discussed in our previous paper. We tabulate the resulting EOS at over 73,000 grid points in the temperature range $T$ = 0.158 to 15.8 MeV, the density range $n_B$ = 10$^{-8}$ to 0.1 fm$^{-3}$, and the proton fraction range $Y_P$ = 0.05 to 0.56. In the future we plan to match these low density results to our earlier high density mean field results, and generate a full EOS table for use in supernova and neutron star merger simulations. This Virial EOS is exact in the low density limit.

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。

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