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Nuclear cluster structure effect on elliptic and triangular flows in heavy-ion collisions

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The initial geometry effect on collective flows, which are inherited from initial projectile structure, is studied in relativistic heavy-ion collisions of C-12 + Au-197 by using a multiphase transport model (AMPT). Elliptic flow (v(2)) and triangular flow (v(3)) which are significantly resulted from the chain and triangle structure of C-12 with three-alpha clusters, respectively, in central C-12 + Au-197 collisions are compared with the flow from the Woods-Saxon distribution of nucleons in C-12. v(3)/v(2) is proposed as a probe to distinguish the pattern of alpha-clustered C-12. This study demonstrates that the initial geometry of the collision zone inherited from nuclear structure can be explored by collective flow at the final stage in heavy-ion collisions.

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