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Signatures of α -clustering in O16 by using a multiphase transport model
Physical Review C ( IF 3.1 ) Pub Date : 2020-11-11 , DOI: 10.1103/physrevc.102.054907
Yi-An Li , Song Zhang , Yu-Gang Ma

$\alpha$-clustered structures in light nuclei could be studied through "snapshots" taken by relativistic heavy-ion collisions. A multiphase transport (AMPT) model is employed to simulate the initial structure of collision nuclei and the proceeding collisions at center of mass energy $\sqrt{s_{NN}}$ = 6.37 TeV. This initial structure can finally be reflected in the subsequent observations, such as elliptic flow ($v_{2}$), triangular flow ($v_{3}$) and quadrangular flow ($v_4$). Three sets of the collision systems are chosen to illustrate system scan is a good way to identify the exotic $\alpha$-clustered nuclear structure, case I: $\mathrm{^{16}O}$ nucleus (with or without $\alpha$-cluster) + ordinary nuclei (always in Woods-Saxon distribution) in most central collisions, case II: $\mathrm{^{16}O}$ nucleus (with or without $\alpha$-cluster) + $\mathrm{^{197}Au}$ nucleus collisions for centrality dependence, and case III: symmetric collision systems (namely, $^{10}$B + $^{10}$B, $^{12}$C + $^{12}$C, $^{16}$O + $^{16}$O (with or without $\alpha$-cluster), $^{20}$Ne + $^{20}$Ne, and $^{40}$Ca + $^{40}$Ca) in most central collisions. Our calculations propose that relativistic heavy-ion collision experiments at $\sqrt{s_{NN}}$ = 6.37 TeV are promised to distinguish the tetrahedron structure of $\mathrm{^{16}O}$ from the Woods-Saxon one and shed lights on the system scan projects in experiments.

中文翻译:

使用多相输运模型在 O16 中的α-聚类特征

轻原子核中的 $\alpha$ 簇结构可以通过相对论重离子碰撞拍摄的“快照”进行研究。采用多相输运 (AMPT) 模型来模拟碰撞核的初始结构和质心能量 $\sqrt{s_{NN}}$ = 6.37 TeV 处的后续碰撞。这种初始结构最终可以反映在后续的观察中,例如椭圆流($v_{2}$)、三角流($v_{3}$)和四边形流($v_4$)。选择了三组碰撞系统来说明系统扫描是识别奇异的 $\alpha$-clustered 核结构的好方法,案例 I:$\mathrm{^{16}O}$ 核(有或没有 $\ alpha$-cluster) + 普通原子核(总是在 Woods-Saxon 分布中)在大多数中心碰撞中,情况二:$\mathrm{^{16}O}$ 核(有或没有 $\alpha$-cluster)+ $\mathrm{^{197}Au}$ 核碰撞的中心性依赖,以及情况 III:对称碰撞系统(即, $^{10}$B + $^{10}$B, $^{12}$C + $^{12}$C, $^{16}$O + $^{16}$O(与或没有 $\alpha$-cluster)、$^{20}$Ne + $^{20}$Ne 和 $^{40}$Ca + $^{40}$Ca) 在大多数中心碰撞中。我们的计算表明,$\sqrt{s_{NN}}$ = 6.37 TeV 的相对论重离子碰撞实验有望将 $\mathrm{^{16}O}$ 的四面体结构与 Woods-Saxon 结构区分开来,并且在实验中阐明系统扫描项目。$^{20}$Ne + $^{20}$Ne 和 $^{40}$Ca + $^{40}$Ca) 在大多数中央碰撞中。我们的计算表明,$\sqrt{s_{NN}}$ = 6.37 TeV 的相对论重离子碰撞实验有望将 $\mathrm{^{16}O}$ 的四面体结构与 Woods-Saxon 结构区分开来,并且在实验中阐明系统扫描项目。$^{20}$Ne + $^{20}$Ne 和 $^{40}$Ca + $^{40}$Ca) 在大多数中央碰撞中。我们的计算表明,$\sqrt{s_{NN}}$ = 6.37 TeV 的相对论重离子碰撞实验有望将 $\mathrm{^{16}O}$ 的四面体结构与 Woods-Saxon 结构区分开来,并且在实验中阐明系统扫描项目。
更新日期:2020-11-11
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