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Chinese Physics C> 2001, Vol. 25> Issue(12) : 1184-1190 

Directed and Elliptic Flow in Heavy Ion Collisions

  •  Shanghai Institute of Nuclear Research, The Chinese Academy of Sciences, Shanghai 201800, China2 Department of Physics, Ningbo University, Ningbo 315000, China3 Department of Electron Engineering, East China Normal University, Shanghai 200062, China

  • The directed and elliptic flow in collisions of 40Ca+40Ca at energies from 30MeV/nucleon to 150MeV/nucleon is well studied in an isospin-dependent quantum molecule dynamics model (IQMD). With increasing incident energy, the directed flow rises from the negative to the positive and the elliptic flow shows decrease with increasing incident energy. The directed flow and the elliptic flow are sensible of the impact parameter and incident energy but they are not very sensible of systematic energy. The directed flow and the elliptic flow are also not very sensible of the EOS because of the combined systematic mass. Systematic studies of the cluster mass dependence are also carefully performed and the elliptic flow of heavy cluster mass is larger than that of light cluster mass. The difference of elliptic flow between the heavy cluster mass and the light one will be not very obvious with increasing incident energy because of large number of light cluster mass.
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    [1] . Peter J et al.Nucl.Phys.,1990,A519:127c—135c 2. Olilvie C A et al.Phys.Rev.,1990,C42:R10—R183. Krofcheck D et al.Phys.Rev.,1992,C46:1416—14244. Klakow D et al.Phys.Rev.,1993,C48:1982—1989 5. MAY G et al.Phys.Rev.,1993,C48:R1492—R14966. MAY G et al.Z .Phys.,1993,A344:469—4747. MAY G et al.Phys.Rev.,1995,C51:3256—3263 8. ZHENG Y M et al.Phys.Rev.Lett.,1999,83:2534—2537 9. CHEN L W et al.Phys.Rev.,1998,C58:2283—229110. Appelshauser H et al.Phys.Rev.,1998,C80:4136—4144 11. Danieleuicz P et al.Phys.Rev.,1998,C81:2438—244112. Aichelin J.Phys.Rep.,1990,202:233—240 13. CHEN L W ,ZHANG X D ,GE L X .High Energy Phys.and Nucl. Phys.,1998,20:109—114(in Chinese)(陈列文,张晓东,葛凌霄.高能物理与核物理,1998,20:109—114)14. CHEN B ,LIU J Y ,ZHANG F S et al.High Energy Phys.and Nucl.Phys.,2000,24:244—249(in Chinese)(陈波,刘建业,张丰收等.高能物理与核物理,2000,24:244—249)15. CHEN K et al.Phy.Rev.,1968,C166:949—95816. Voloshin S A .Phys.Rev.,1997,C55:R1630—R1637;Poskanzer A M ,Voloshin S A .Phys.Rev.,1998,C58:1671—167817. Westfall G D et al.Phys.Rev.Lett.,1993,71:1986—198918. ZHANG H Y ,MA Y G ,YU L P et al.Submitted to Chinese Physics Letter(accepted)

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ZHANG Hu-Yong, MA Yu-Gang, YU Li-Ping, SHEN Wen-Qing, CAI Xiang-Zhou, FANG De-Qing, HU Peng-Yun, ZHONG Chen and HAN Ding-Ding. Directed and Elliptic Flow in Heavy Ion Collisions[J]. Chinese Physics C, 2001, 25(12): 1184-1190.
ZHANG Hu-Yong, MA Yu-Gang, YU Li-Ping, SHEN Wen-Qing, CAI Xiang-Zhou, FANG De-Qing, HU Peng-Yun, ZHONG Chen and HAN Ding-Ding. Directed and Elliptic Flow in Heavy Ion Collisions[J]. Chinese Physics C, 2001, 25(12): 1184-1190. shu
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Received: 2000-12-22
Revised: 1900-01-01
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Directed and Elliptic Flow in Heavy Ion Collisions

    Corresponding author: ZHANG Hu-Yong,
  • Shanghai Institute of Nuclear Research, The Chinese Academy of Sciences, Shanghai 201800, China2 Department of Physics, Ningbo University, Ningbo 315000, China3 Department of Electron Engineering, East China Normal University, Shanghai 200062, China
  • Received Date: 2000-12-22
  • Accepted Date: 1900-01-01
  • Available Online: 2001-12-05

Abstract: The directed and elliptic flow in collisions of 40Ca+40Ca at energies from 30MeV/nucleon to 150MeV/nucleon is well studied in an isospin-dependent quantum molecule dynamics model (IQMD). With increasing incident energy, the directed flow rises from the negative to the positive and the elliptic flow shows decrease with increasing incident energy. The directed flow and the elliptic flow are sensible of the impact parameter and incident energy but they are not very sensible of systematic energy. The directed flow and the elliptic flow are also not very sensible of the EOS because of the combined systematic mass. Systematic studies of the cluster mass dependence are also carefully performed and the elliptic flow of heavy cluster mass is larger than that of light cluster mass. The difference of elliptic flow between the heavy cluster mass and the light one will be not very obvious with increasing incident energy because of large number of light cluster mass.

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