Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-09-09
Chin.Phys.16:2676,2007
Physics
Nuclear Physics
Nuclear Theory
5 pages, 5 figures
Scientific paper
10.1088/1009-1963/16/9/031
Elliptic flow ($v_2$) and hexadecupole flow ($v_4$) of light clusters have been studied in details for 25 MeV/nucleon $^{86}$Kr + $^{124}$Sn at large impact parameters by Quantum Molecular Dynamics model with different potential parameters. Four parameter sets which include soft or hard equation of state (EOS) with/without symmetry energy term are used. Both number-of-nucleon ($A$) scaling of the elliptic flow versus transverse momentum ($p_t$) and the scaling of $v_4/A^{2}$ versus $(p_t/A)^2$ have been demonstrated for the light clusters in all above calculation conditions. It was also found that the ratio of $v_4/{v_2}^2$ keeps a constant of 1/2 which is independent of $p_t$ for all the light fragments. By comparisons among different combinations of EOS and symmetry potential term, the results show that the above scaling behaviors are solid which do not depend the details of potential, while the strength of flows is sensitive to EOS and symmetry potential term.
Cai Xiang-Zhou
Fang De-Qing
Guo Wangmei
Ma C. W.
Ma Yong-Ge
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