Isospin Effect of Momentum Dependent Interaction in Heavy Ion Collisions

LIU Jian-Ye; GUO Wen-Jun; Xing Yong-Zhong; LI Xi-Guo

Chinese Physics C> 2005, Vol. 29> Issue(5) : 456-460

Isospin Effect of Momentum Dependent Interaction in Heavy Ion Collisions

Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,Chaiese2 Institute of Modern Physics, CAS,Lanzhou 730000,Chinese3 Department of Physics,Tianshui Normal College,Gansu Tianshui 741000,Chinese

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Abstract：
We insert the isospin degree of freedom into the momentum dependent interaction to obtain an isospin and momentum dependent interaction given in a form practically usable in isospin dependent quantum molecular dynamics model. We investigate the isospin effect of momentum dependent interaction on the observable in the intermediate energy heavy ion collisions. It is found that momentum dependent interaction with and without isospin dependence, lead to significant different predictions on the nuclear stopping (momentum dissipation) and isospin fractionation ratio. In particular the momentum dependent interaction with the isospin degree of freedom induces the reductions for the strong dependence of nuclear stopping on the two-body collisions and the sensitive dependence of isospin fractionation ratio on the symmetry potential. However it does not change obviously above features for the nuclear stopping and isospin fractionation ratio as the good probe of in-medium nucleon nucleon cross section and symmetry potential respectively. The isospin dependence of momentum dependent interaction is thus important for studying accurately the equation of state of isospin asymmetry nuclear matter.

References

[1]

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[15]	ZHAO Qiang , LIU JianYe , ZHANG FengShou , WANG ShunJin , ZUO Wei , CHEN LieWen . Isospin Effect in Multifragmentation Process of Heavy Ion Collisions at Intermediate Energy. Chinese Physics C, 2000, 24(11): 1024-1029.
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LIU Jian-Ye, GUO Wen-Jun, Xing Yong-Zhong and LI Xi-Guo. Isospin Effect of Momentum Dependent Interaction in Heavy Ion Collisions[J]. Chinese Physics C, 2005, 29(5): 456-460.

LIU Jian-Ye, GUO Wen-Jun, Xing Yong-Zhong and LI Xi-Guo. Isospin Effect of Momentum Dependent Interaction in Heavy Ion Collisions[J]. Chinese Physics C, 2005, 29(5): 456-460. shu

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Received: 2004-08-09
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Isospin Effect of Momentum Dependent Interaction in Heavy Ion Collisions

Corresponding author: LIU Jian-Ye,

Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,Chaiese2 Institute of Modern Physics, CAS,Lanzhou 730000,Chinese3 Department of Physics,Tianshui Normal College,Gansu Tianshui 741000,Chinese

Received Date: 2004-08-09

Accepted Date: 1900-01-01

Available Online: 2005-05-05

Abstract: We insert the isospin degree of freedom into the momentum dependent interaction to obtain an isospin and momentum dependent interaction given in a form practically usable in isospin dependent quantum molecular dynamics model. We investigate the isospin effect of momentum dependent interaction on the observable in the intermediate energy heavy ion collisions. It is found that momentum dependent interaction with and without isospin dependence, lead to significant different predictions on the nuclear stopping (momentum dissipation) and isospin fractionation ratio. In particular the momentum dependent interaction with the isospin degree of freedom induces the reductions for the strong dependence of nuclear stopping on the two-body collisions and the sensitive dependence of isospin fractionation ratio on the symmetry potential. However it does not change obviously above features for the nuclear stopping and isospin fractionation ratio as the good probe of in-medium nucleon nucleon cross section and symmetry potential respectively. 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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Isospin Effect of Momentum Dependent Interaction in Heavy Ion Collisions

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