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arXiv 0711.0127nucl-thnucl-ex
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量子分子动力学模型对25 MeV/nucleon Ca + Ca各向异性流快度依赖的唯象标度

Phenomenological Scaling of Rapidity Dependence for Anisotropic Flows in 25 MeV/nucleon Ca + Ca by Quantum Molecular Dynamics Model

T. Z. Yan, Y. G. Ma, X. Z. Cai, D. Q. Fang, G. C. Lu, W. Q. Shen, W. D. Tian, H. W. Wang, K. Wang

摘要:

用量子分子动力学模型研究了25 MeV/核子$^{40}$ Ca + $^{40}$ Ca在大碰撞参量下轻碎片流($v_1$,$v_2$,$v_3$和$v_4$)随快度的变化.研究表明,快度相关流动参数$v_n$(n = 1,2,3,4)的标度行为是质量数加常数项的函数,这可能是集体运动和随机运动相互作用的结果。此外,$v_4/{v_2}^2$几乎与快度无关,对所有轻碎片都保持1/2的粗略常数。

英文摘要:

Anisotropic flows ($v_1$, $v_2$, $v_3$ and $v_4$) of light fragments up till the mass number 4 as a function of rapidity have been studied for 25 MeV/nucleon $^{40}$Ca + $^{40}$Ca at large impact parameters by Quantum Molecular Dynamics model. A phenomenological scaling behavior of rapidity dependent flow parameters $v_n$ (n = 1, 2, 3 and 4) has been found as a function of mass number plus a constant term, which may arise from the interplay of collective and random motions. In addition, $v_4/{v_2}^2$ keeps almost independent of rapidity and remains a rough constant of 1/2 for all light fragments.

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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