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arXiv 1001.1102nucl-th
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稀温核物质的对称能

Symmetry energy of dilute warm nuclear matter

J. B. Natowitz, G. Ropke, S. Typel, D. Blaschke, A. Bonasera, K. Hagel, T. Klahn, S. Kowalski, L. Qin, S. Shlomo, R. Wada, H. H. Wolter

摘要:

核物质的对称能是研究奇异核、重离子碰撞和天体物理现象的基本组成部分。新的数据从重离子碰撞可以用来提取自由对称能和内部对称能在亚饱和密度和温度低于10 MeV。基于平均场方法的对称能的传统理论计算不能给出正确的低温,低密度限制,这是由相关性,特别是由束缚态的外观。最近开发的量子统计(QS)的方法,考虑到集群的形成预测的对称性能量是非常好的协议与实验数据。一个一致的描述的对称性能量,加入正确的低密度极限与准粒子的方法有效的饱和密度附近。

英文摘要:

The symmetry energy of nuclear matter is a fundamental ingredient in the investigation of exotic nuclei, heavy-ion collisions and astrophysical phenomena. New data from heavy-ion collisions can be used to extract the free symmetry energy and the internal symmetry energy at subsaturation densities and temperatures below 10 MeV. Conventional theoretical calculations of the symmetry energy based on mean-field approaches fail to give the correct low-temperature, low-density limit that is governed by correlations, in particular by the appearance of bound states. A recently developed quantum statistical (QS) approach that takes the formation of clusters into account predicts symmetry energies that are in very good agreement with the experimental data. A consistent description of the symmetry energy is given that joins the correct low-density limit with quasiparticle approaches valid near the saturation density.

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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