Isospin effects on rotational flow in intermediate energy heavy ion collisions

被引：24

作者：

Chen, LW ^{[1
]}

Zhang, FS

Zhu, ZY

机构：

[1] Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China

[2] Acad Sinica, Inst Modern Phys, Lanzhou 730000, Peoples R China

[3] Acad Sinica, Shanghai Inst Nucl Res, Shanghai 201800, Peoples R China

[4] CCAST, World Lab, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW C | 2000年 / 61卷 / 06期

关键词：

D O I：

10.1103/PhysRevC.61.067601

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Within the framework of an isospin-dependent quantum molecular-dynamics model, the rotational flow in reactions of Fe-58+Fe-58 and Ni-58+Ni-58 at 40 MeV/nucleon for different impact parameters is investigated by analyzing the midrapidity azimuthal distribution. The rotational observables are also calculated semiquantitatively. For the first time, it is found that the more neutron-rich system (Fe-58+Fe-58) exhibits stronger rotational collective flow. This isospin dependence of rotational collective flow is more appreciable in semiperipheral collisions and it is shown to mainly result from the isospin dependence of nucleon-nucleon cross section rather than the symmetry energy. Meanwhile, it is indicated that the rotational flow depends strongly on the impact parameter.

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页数：4

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