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arXiv 1111.4163nucl-thnucl-ex
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通过亚饱和密度下的多重碎裂探索对称能的密度依赖性

Probing the density dependence of symmetry energy via multifragmentation at sub-saturation densities

Sanjeev Kumar, Y. G. Ma, G. Q. Zhang, C. L. Zhou

摘要:

本文在一个与同位旋相关的量子分子动力学模型的框架下,研究了亚饱和密度下非对称核物质的对称能,并与Famiano等人的实验数据进行了比较。97,052701(2006)]。我们还进行了比较的实验,以及不同的理论结果的Boltzmann-Uehling-Uhlenbeck在1997年,同位旋相关的Boltzmann-Uehling-Uhlenbeck在2004年,Boltzmann-Nordeim-Vlasov,和改进的量子分子动力学模型的双比。结果表明,双比值预测了对称能的软度,而单比值则低估了对称能的软度。此外,单比的研究扩展到不同类型的碎片,而双比扩展到不同的丰中子同位素的Sn。

英文摘要:

Symmetry energy for asymmetric nuclear matter at subsaturation densitieswas investigated in the framework of an isospin-dependent quantum molecular dynamics model.Asingle ratio of neutrons and protons is comparedwith the experimental data of Famiano et al. [Phys. Rev. Lett. 97, 052701 (2006)]. We have also performed a comparison for the double ratio with experimental as well as different theoretical results of Boltzmann-Uehling-Uhlenbeck in 1997, Isospin-dependent Boltzmann-Uehling-Uhlenbeck in 2004, Boltzmann-Nordeim-Vlasov, and Improved QuantumMolecular Dynamics models. It is found that the double ratio predicts the softness of symmetry energy, which is a little underestimated in the single ratio. Furthermore, the study of the single ratio is extended for different kinds of fragments, while the double ratio is extended for different neutron-rich isotopes of Sn.

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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