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Isospin Momentum-Dependent Interaction and Its Role on the Isospin Fractionation Ratio in Intermediate Energy Heavy Ion Collisions |
| LIU Jian-Ye1,2,3;GUO Wen-Jun3;XING Yong-Zhong1,2;LEE Xi-Guo1,3 |
| 1Centre of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
2Department of Physics, Tianshui Normal College, Tianshui 741000
3Institute of Modern Physics, Chinese Academy of Sciences, PO Box 31, Lanzhou 730000 |
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| Cite this article: |
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LIU Jian-Ye, GUO Wen-Jun, XING Yong-Zhong et al 2005 Chin. Phys. Lett. 22 65-68 |
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Abstract We investigate the role of isospin momentum-dependent interaction on the isospin fractionation ratio and its dynamical mechanism in the intermediate energy heavy ion collisions, by inserting an isospin degree of freedom into the momentum-dependent interaction to obtain an isospin momentum-dependent interaction given in a form practically usable in the isospin-dependent quantum molecular dynamics model. It is found that the isospin momentum-dependent interaction brings an important isospin effect into the isospin fractionation ratio. In particular, the isospin momentum-dependent interaction reduces obviously the reduction of isospin fractionation ratio. Thus the isospin dependence of momentum-dependent interaction is thus important for studying accurately the equation of state of isospin asymmetry nuclear matter.
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25.70.Pg
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Published: 01 January 2005
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