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arXiv 1003.4864nucl-thnucl-ex
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有限核的对称性和表面对称性能量

Symmetry and Surface Symmetry Energies in Finite Nuclei

S. J. Lee, A. Z. Mekjian

摘要:

利用密度泛函理论研究了原子核的对称能性质。有限核的计算,使研究包括同位旋相关的表面对称性的考虑,以及同位旋独立的表面效应。计算在零和非零温度下进行。结果表明,表面对称能项对温度的敏感性最高,体能项对温度的敏感性最低。结果还表明,温度依赖项对所用的力不敏感,甚至对中子皮的存在更不敏感。结果与对称能量的体积和表面项进行比较,只有体积项沿线的$β$稳定性的对称能量。在$A$的总质量范围的一个很好的分数上显示了几个MeV的差异。同时给出了体项、表面项和库仑项的计算。

英文摘要:

A study of properties of the symmetry energy of nuclei is presented based on density functional theory. Calculations for finite nuclei are given so that the study includes isospin dependent surface symmetry considerations as well as isospin independent surface effects. Calculations are done at both zero and non-zero temperature. It is shown that the surface symmetry energy term is the most sensitive to the temperature while the bulk energy term is the least sensitive. It is also shown that the temperature dependence terms are insensitive to the force used and even more insensitive to the existence of neutron skin. Results for a symmetry energy with both volume and surface terms are compared with a symmetry energy with only volume terms along the line of $β$ stability. Differences of several MeV are shown over a good fraction of the total mass range in $A$. Also given are calculations for the bulk, surface and Coulomb terms.

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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