Isospin Effects on Collective Flow in HIC at Intermediate Energies

Chen Liewen; Zhang Fengshou; Zeng Xianghua; Jin Genming

Chinese Physics C> 1998, Vol. 22> Issue(11) : 1035-1041

Isospin Effects on Collective Flow in HIC at Intermediate Energies

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

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Based on an isospin-dependent quantum molecular dynanics model, the neutron and proton density calculated from Skyrme-Hartree-Fock theory, along with the neutron and proton Fermi momenta calculated from Fermi gas model, are used to sample stable initial nuclei, ⁵⁸Fe and ⁵⁸Ni. The isospin effects on collective flow in reaction systems 55MeV/u ⁵⁸Fe+⁵⁸Fe and 55MeV/u ⁵⁸Ni+⁵⁸Ni are studied in detail.At different impact parameters for different types of fragments, it is shown that the neutron-rich system ⁵⁸Fe+⁵⁸Fe has stronger collective flow than the system ⁵⁸Ni+⁵⁸Ni,which could qualitatively agree with the results of the experiments. Meanwhile, the effects of both isospin-dependent symmetry energy and nucleon-nucleon cross sections on collective flow are studied.

References

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Chen Liewen, Zhang Fengshou, Zeng Xianghua and Jin Genming. Isospin Effects on Collective Flow in HIC at Intermediate Energies[J]. Chinese Physics C, 1998, 22(11): 1035-1041.

Chen Liewen, Zhang Fengshou, Zeng Xianghua and Jin Genming. Isospin Effects on Collective Flow in HIC at Intermediate Energies[J]. Chinese Physics C, 1998, 22(11): 1035-1041. shu

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Received: 1997-11-18
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Isospin Effects on Collective Flow in HIC at Intermediate Energies

Corresponding author: Chen Liewen,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

Received Date: 1997-11-18

Accepted Date: 1900-01-01

Available Online: 1998-11-05

Abstract: Based on an isospin-dependent quantum molecular dynanics model, the neutron and proton density calculated from Skyrme-Hartree-Fock theory, along with the neutron and proton Fermi momenta calculated from Fermi gas model, are used to sample stable initial nuclei, ⁵⁸Fe and ⁵⁸Ni. The isospin effects on collective flow in reaction systems 55MeV/u ⁵⁸Fe+⁵⁸Fe and 55MeV/u ⁵⁸Ni+⁵⁸Ni are studied in detail.At different impact parameters for different types of fragments, it is shown that the neutron-rich system ⁵⁸Fe+⁵⁸Fe has stronger collective flow than the system ⁵⁸Ni+⁵⁸Ni,which could qualitatively agree with the results of the experiments. Meanwhile, the effects of both isospin-dependent symmetry energy and nucleon-nucleon cross sections on collective flow are studied.

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Isospin Effects on Collective Flow in HIC at Intermediate Energies

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