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arXiv 0708.3684nucl-thnucl-ex
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团簇发射和对称能对中子-质子谱倍比的影响

The influence of cluster emission and the symmetry energy on neutron-proton spectral double ratios

Y. X. Zhang, P. Danielewicz, M. Famiano, Z. Li, W. G. Lynch, M. B. Tsang

摘要:

采用改进的量子分子动力学模型,在核物质状态方程中引入两种不同的对称能密度依赖关系,模拟了124 Sn +124 Sn和112 Sn +112 Sn反应中心碰撞的自由中子和质子发射.两个反应系统的中子质子比的构造的双比率被发现是敏感的EOS中的对称项。团簇形成的影响进行了研究,发现影响的双倍比主要在低能量区。为了更好地利用输运模型提取关于对称能量的信息,因此重要的是在高能量区域中具有准确的数据,该区域也受顺序衰变的影响最小。

英文摘要:

Emissions of free neutrons and protons from the central collisions of 124Sn+124Sn and 112Sn+112Sn reactions are simulated using the Improved Quantum Molecular Dynamics model with two different density dependence of the symmetry energy in the nuclear equation of state. The constructed double ratios of the neutron to proton ratios of the two reaction systems are found to be sensitive to the symmetry terms in the EOS. The effect of cluster formation is examined and found to affect the double ratios mainly in the low energy region. In order to extract better information on symmetry energy with transport models, it is therefore important to have accurate data in the high energy region which also is affected minimally by sequential decays.

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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