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arXiv 1002.4325nucl-th
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从核质量推导亚核密度的对称能

Symmetry energy at subnuclear densities deduced from nuclear masses

Kazuhiro Oyamatsu, Kei Iida

摘要:

我们研究了核质量如何与对称能的密度依赖性有关。利用一个宏观核模型,我们以依赖于非对称核物质状态方程的方式计算核质量。我们发现,通过与经验的两个质子分离能的比较,在亚核密度,对应于一个较大的密度对称系数L,一个较小的对称能是有利的。这种趋势,这是清楚地看到,为中子丰富,非变形,和轻的核,可以理解的性质,表面对称性能量在一个可压缩的液滴图片。

英文摘要:

We examine how nuclear masses are related to the density dependence of the symmetry energy. Using a macroscopic nuclear model we calculate nuclear masses in a way dependent on the equation of state of asymmetric nuclear matter. We find by comparison with empirical two-proton separation energies that a smaller symmetry energy at subnuclear densities, corresponding to a larger density symmetry coefficient L, is favored. This tendency, which is clearly seen for nuclei that are neutron-rich, nondeformed, and light, can be understood from the property of the surface symmetry energy in a compressible liquid-drop picture.

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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