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Phenomenological Scaling of Rapidity Dependence for Anisotropic Flows in 25MeV/nucleon Ca+Ca by Quantum Molecular Dynamics Model |
YAN Ting-Zhi 1,2;MA Yu-Gang1;CAI Xiang-Zhou1;FANG De-Qing1;LU
Guang-Cheng1;SHEN Wen-Qing1;TIAN Wen-Dong1;WANG Hong-Wei1;WANG Kun |
| 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 2018002Graduate School of the Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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YAN Ting-Zhi, MA Yu-Gang, CAI Xiang-Zhou et al 2007 Chin. Phys. Lett. 24 3388-3391 |
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Abstract Anisotropic flows (v1, v2, v3 and v4) of light fragments up to the mass number 4 as a function of rapidity are studied for 25MeV/nucleon 40Ca + 40Ca at large
impact parameters by a quantum molecular dynamics model. A phenomenological scaling behaviour of rapidity dependent flow parameters vn (n = 1, 2, 3 and 4) is found as a function of mass number plus a constant term, which may arise from the interplay of collective and random motions. In addition, v4v22 keeps to be almost independent of rapidity and remains a
rough constant of 1/2 for all light fragments.
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| Keywords:
25.75.Ld
24.10.-i
21.60.Ka
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Received: 17 September 2007
Published: 03 December 2007
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