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arXiv 1009.0801nucl-th
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非对称核物质两相共存区的有限温度集体模

Finite temperature collective modes in a two phase coexistence region of asymmetric nuclear matter

R. M. Aguirre, A. L. De Paoli

摘要:

研究了低密度核物质中集体模与相变的关系。集体模的色散关系,在线性方法内的朗道-费米液体计划,通过假设共存相的热力学平衡进行评估。温度和同位旋组成作为相关参数。介质中的核相互作用取自最近提出的密度泛函模型。我们发现显着的修改,在一定范围内的温度和同位旋不对称性的能量谱,由于分离的物质成独立的阶段。我们的结论是,详细的计算不应该忽略这种影响。

英文摘要:

The relation between collective modes and the phase transition in low density nuclear matter is examined. The dispersion relations for collective modes in a linear approach are evaluated within a Landau-Fermi liquid scheme by assuming coexisting phases in thermodynamical equilibrium. Temperature and isospin composition are taken as relevant parameters. The in-medium nuclear interaction is taken from a recently proposed density functional model. We found significative modifications in the energy spectrum, within certain range of temperatures and isospin asymmetry, due to the separation of matter into independent phases. We conclude that detailed calculations should not neglect this effect.

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