Properties and Mechanism of Isospin Fractionation in Intermediate Energy Heavy Ion Collisions

LIU  Jian-ye; XING  Yong-zhong; GUO Wen-jun

doi:10.11804/NuclPhysRev.21.02.086

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LIU Jian-ye, XING Yong-zhong, GUO Wen-jun. Properties and Mechanism of Isospin Fractionation in Intermediate Energy Heavy Ion Collisions[J]. Nuclear Physics Review, 2004, 21(2): 86-89. doi: 10.11804/NuclPhysRev.21.02.086

Citation:

LIU Jian-ye, XING Yong-zhong, GUO Wen-jun. Properties and Mechanism of Isospin Fractionation in Intermediate Energy Heavy Ion Collisions[J]. Nuclear Physics Review, 2004, 21(2): 86-89. doi: 10.11804/NuclPhysRev.21.02.086

Properties and Mechanism of Isospin Fractionation in Intermediate Energy Heavy Ion Collisions

doi: 10.11804/NuclPhysRev.21.02.086

1 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China; 2Institute for the Theory of Modern Physics, Tianshui Normal University, Tianshui 741000, Gansu, China; 3Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2004-06-20

Abstract

The degree of isospin fractionation is measured by (N/Z)gas / (N/Z)liq，where (N/Z)gas and (N/Z)liq are the saturated neutronproton ratio of nucleon emissions ( gas phase) and that of fragment emitted (liquid phase) in heavy ion collision at intermediate energy. The calculated results by using the isospindependent quantum molecular dynamics model show that the degree of isospin fractionation is sensitive to the neutronproton ratio of colliding system. In particular， the degree of isospin fractionation sensitively depends on the symmetry potential and weakly on the inmedium nucleonnucleon cross section for the neutronrich system. In this case， we propose that the degree of isospin fractionation can be directly compared with the experimental data so that the information about symmetry potential can be obtained.
- intermediate energy heavy ion collision,
- isospin fractionation,
- symmetry potential,
- isospin effect
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Properties and Mechanism of Isospin Fractionation in Intermediate Energy Heavy Ion Collisions

doi: 10.11804/NuclPhysRev.21.02.086

1 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China; 2Institute for the Theory of Modern Physics, Tianshui Normal University, Tianshui 741000, Gansu, China; 3Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2004-06-20

Key words:

intermediate energy heavy ion collision /
isospin fractionation /
symmetry potential /
isospin effect

Abstract: The degree of isospin fractionation is measured by (N/Z)gas / (N/Z)liq，where (N/Z)gas and (N/Z)liq are the saturated neutronproton ratio of nucleon emissions ( gas phase) and that of fragment emitted (liquid phase) in heavy ion collision at intermediate energy. The calculated results by using the isospindependent quantum molecular dynamics model show that the degree of isospin fractionation is sensitive to the neutronproton ratio of colliding system. In particular， the degree of isospin fractionation sensitively depends on the symmetry potential and weakly on the inmedium nucleonnucleon cross section for the neutronrich system. In this case， we propose that the degree of isospin fractionation can be directly compared with the experimental data so that the information about symmetry potential can be obtained.