| Effect of entrance-channel asymmetry on the isospin dependence of nucleon emission in heavy ion collisions |
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| 作者姓名： | 张芳 左维 陈继延 周振肖 |
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| 作者单位： | Institute of Modern Physics Chinese Academy of Sciences，Lanzhou 730000，China Institute of Theoretical Physics，Lanzhou University，Lanzhou 730000，China，Institute of Modern Physics，Chinese Academy of Sciences，Lanzhou 730000，China Institute of Theoretical Physics，Lanzhou University，Lanzhou 730000，China Center of Theoretical Physics，National Laboratory of Heavy Ion Accelerator，Lanzhou 730000，China Graduate University of Chinese Academy of Sciences，Beijing 100049，China，Institute of Modern Physics，Chinese Academy of Sciences，Lanzhou 730000，China，School of Nuclear Science and Technology，Lanzhou University，Lanzhou 730000，China |
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| 摘 要： | Using the isospin- and momentum-dependent hadronic transport model IBUU04, we have investigated the influence of the entrance-channel isospin asymmetry on the sensitivity of the pre-equilibrium neutron/proton ratio to symmetry energy in central heavy-ion collisions induced by high-energy radioactive beams. Our analysis and discussion are based on the dynamical simulations of the three
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| 关 键 词： | neutron to proton ratio symmetry energy isospin asymmetry of reaction system hadronic transport model |
| 收稿时间： | 2007-7-24 |
| 修稿时间： | 2008-3-27 |
Effect of entrance-channel asymmetry on the isospin dependence of nucleon emission in heavy ion collisions |
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| ZHANC Fang ZUO Wei CHEN Ji-Yan ZHOU Zhen-Xiao.Effect of entrance-channel asymmetry on the isospin dependence of nucleon emission in heavy ion collisions[J].High Energy Physics and Nuclear Physics,2008,32(7):561-564. |
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| Authors: | ZHANC Fang ZUO Wei CHEN Ji-Yan ZHOU Zhen-Xiao |
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| Institution: | [1]Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China [2]Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000, China [3]Center of Theoretical Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China [4]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [5]School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | Using the isospin-and momentum-dependent hadronic transport model IBUU04,we have in- vestigated the influence of the entrance-channel isospin asymmetry on the sensitivity of the pre-equilibrium neutron/proton ratio to symmetry energy in central heavy-ion collisions induced by high-energy radioactive beams.Our analysis and discussion are based on the dynamical simulations of the three isotopic reaction systems ~(132)Sn ~(124)Sn,~(124)Sn ~(112)Sn and ~(112)Sn ~(112)Sn which are of the same total proton number but different isospin asymmetry.We find that the kinetic-energy distributions of the pre-equilibrium neutron/proton ratio are quite sensitive to the density-dependence of symmetry energy at incident beam energy E/A = 400 MeV, and the sensitivity increases as the isospin asymmetry of the reaction system increases. |
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| Keywords: | neutron to proton ratio symmetry energy isospin asymmetry of reaction system hadronic transport model |
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