Entrance Channel Dependence of the Isospin Effects of the Nuclear Stopping in Intermediate Energy Heavy Ion Collisions

YANG Yan-Fang; LIU Jian-Ye; ZUO Wei; GUO Wen-Jun; ZHAO Qiang

Chinese Physics C> 2001, Vol. 25> Issue(8) : 765-771

Entrance Channel Dependence of the Isospin Effects of the Nuclear Stopping in Intermediate Energy Heavy Ion Collisions

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000,China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000,China

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Abstract：
The entrance channel dependence on the isospin effects of the nuclear stopping in intermediate energy heavy ion collisions was studied by using the isospin-dependent quantum molecular dynamics with three forms of the symmetry potential. It shows that the nuclear stopping is sensitive to the beam energy, the impact parameter and the mass of the colliding system, especially very sensitive to the isospin dependence of in-medium nucleon-nucleon cross section, but insensitive to the symmetry potentials and the ratio of neutron to proton of colliding system. From this investigation, we propose that nuclear stopping can be used as a new probe to extract information on the isospin dependence of in-medium nucleon-nucleon cross section in intermediate energy heavy ion collisions.

References

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YANG Yan-Fang, LIU Jian-Ye, ZUO Wei, GUO Wen-Jun and ZHAO Qiang. Entrance Channel Dependence of the Isospin Effects of the Nuclear Stopping in Intermediate Energy Heavy Ion Collisions[J]. Chinese Physics C, 2001, 25(8): 765-771.

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Received: 2000-09-06
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

Entrance Channel Dependence of the Isospin Effects of the Nuclear Stopping in Intermediate Energy Heavy Ion Collisions

Corresponding author: YANG Yan-Fang,

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000,China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000,China

Received Date: 2000-09-06

Accepted Date: 1900-01-01

Available Online: 2001-08-05

Abstract: The entrance channel dependence on the isospin effects of the nuclear stopping in intermediate energy heavy ion collisions was studied by using the isospin-dependent quantum molecular dynamics with three forms of the symmetry potential. It shows that the nuclear stopping is sensitive to the beam energy, the impact parameter and the mass of the colliding system, especially very sensitive to the isospin dependence of in-medium nucleon-nucleon cross section, but insensitive to the symmetry potentials and the ratio of neutron to proton of colliding system. From this investigation, we propose that nuclear stopping can be used as a new probe to extract information on the isospin dependence of in-medium nucleon-nucleon cross section in intermediate energy heavy ion collisions.

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Entrance Channel Dependence of the Isospin Effects of the Nuclear Stopping in Intermediate Energy Heavy Ion Collisions

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