Monte-Carlo Simulation and Study of Sideward Flow for <SUP>238</SUP>U<SUP>238</SUP>U Collisions at CSR Energy Area

WU Ke-Jun; LIU Feng

Chinese Physics C> 2007, Vol. 31> Issue(11) : 1022-1026

Monte-Carlo Simulation and Study of Sideward Flow for ²³⁸U²³⁸U Collisions at CSR Energy Area

WU Ke-Jun ^, ,
LIU Feng

Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China

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Abstract：
The ART(a Relativistic Transport) Model is applied for studying the UU collisions at a beam kinetic energy about 0.52GeV/nucleon. We discuss the time evolution and the centrality dependence for sideward flow of nucleons and pions at two extreme orientation UU collisions. It is found that the collective (side) flow is developed in the high density region and has a saturation in the expansion phase, so it is a sensitive probe for the reaction dynamics in the high density region. A distinct transition from pion flow to antiflow, which is relative to nucleons flow, occurs at the impact parameters of about 8fm and 2fm in tip-tip and body-body UU collisions, respectively. The pion flow is a result of the competition between the collective flow of baryon resonances and the shadowing of spectators through rescatterings and reabsorptions.

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WU Ke-Jun and LIU Feng. Monte-Carlo Simulation and Study of Sideward Flow for ²³⁸U²³⁸U Collisions at CSR Energy Area[J]. Chinese Physics C, 2007, 31(11): 1022-1026.

WU Ke-Jun and LIU Feng. Monte-Carlo Simulation and Study of Sideward Flow for ²³⁸U²³⁸U Collisions at CSR Energy Area[J]. Chinese Physics C, 2007, 31(11): 1022-1026. shu

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Received: 2007-01-04
Revised: 2007-01-31

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沈阳化工大学材料科学与工程学院沈阳 110142

Monte-Carlo Simulation and Study of Sideward Flow for ²³⁸U²³⁸U Collisions at CSR Energy Area

Corresponding author: WU Ke-Jun,

Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China

Received Date: 2007-01-04

Accepted Date: 2007-01-31

Available Online: 2007-11-05

Abstract: The ART(a Relativistic Transport) Model is applied for studying the UU collisions at a beam kinetic energy about 0.52GeV/nucleon. We discuss the time evolution and the centrality dependence for sideward flow of nucleons and pions at two extreme orientation UU collisions. It is found that the collective (side) flow is developed in the high density region and has a saturation in the expansion phase, so it is a sensitive probe for the reaction dynamics in the high density region. A distinct transition from pion flow to antiflow, which is relative to nucleons flow, occurs at the impact parameters of about 8fm and 2fm in tip-tip and body-body UU collisions, respectively. The pion flow is a result of the competition between the collective flow of baryon resonances and the shadowing of spectators through rescatterings and reabsorptions.

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Monte-Carlo Simulation and Study of Sideward Flow for ²³⁸U²³⁸U Collisions at CSR Energy Area

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Monte-Carlo Simulation and Study of Sideward Flow for ²³⁸U²³⁸U Collisions at CSR Energy Area

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Monte-Carlo Simulation and Study of Sideward Flow for 238U238U Collisions at CSR Energy Area

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Monte-Carlo Simulation and Study of Sideward Flow for 238U238U Collisions at CSR Energy Area

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Monte-Carlo Simulation and Study of Sideward Flow for ²³⁸U²³⁸U Collisions at CSR Energy Area

Monte-Carlo Simulation and Study of Sideward Flow for ²³⁸U²³⁸U Collisions at CSR Energy Area