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arXiv 0710.2877nucl-thnucl-ex
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稀非对称核物质中的微分同位旋分馏

Differential isospin-fractionation in dilute asymmetric nuclear matter

Bao-An Li, Lie-Wen Chen, Hong-Ru Ma, Jun Xu, Gao-Chan Yong

摘要:

研究了稀非对称核物质液-相变中的微分同位旋分馏(IsoF)随核子动量的变化。在自洽的热模型中,它示出的气相的中子/质子比成为{ \it小于}比液相的高能核子,虽然气相是整体更中子丰富。明确的指示差分IsoF与热模型预测一致的证明内的重离子反应的传输模型。未来的实验数据的比较将使我们能够提取关键信息的动量依赖的等矢量强相互作用。

英文摘要:

The differential isospin-fractionation (IsoF) during the liquid-gas phase transition in dilute asymmetric nuclear matter is studied as a function of nucleon momentum. Within a self-consistent thermal model it is shown that the neutron/proton ratio of the gas phase becomes {\it smaller} than that of the liquid phase for energetic nucleons, although the gas phase is overall more neutron-rich. Clear indications of the differential IsoF consistent with the thermal model predictions are demonstrated within a transport model for heavy-ion reactions. Future comparisons with experimental data will allow us to extract critical information about the momentum dependence of the isovector strong interaction.

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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