Effect of entrance-channel asymmetry on the isospin dependence of nucleon emission in heavy ion collisions

ZHANG Fang; ZUO Wei; CHEN Ji-Yan; ZHOU Zhen-Xiao

doi:10.1088/1674-1137/32/7/010

Chinese Physics C> 2008, Vol. 32> Issue(7) : 561-564 DOI: 10.1088/1674-1137/32/7/010

Effect of entrance-channel asymmetry on the isospin dependence of nucleon emission in heavy ion collisions

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Abstract：
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
isotopic reaction systems ¹³²Sn+¹²⁴Sn, ¹²⁴Sn+¹¹²Sn and ¹¹²Sn+¹¹²Sn 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=400MeV, and the sensitivity increases as the isospin asymmetry of the reaction system increases.

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ZHANG Fang, ZUO Wei, CHEN Ji-Yan and ZHOU Zhen-Xiao. Effect of entrance-channel asymmetry on the isospin dependence of nucleon emission in heavy ion collisions[J]. Chinese Physics C, 2008, 32(7): 561-564. doi: 10.1088/1674-1137/32/7/010

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Received: 2007-07-24
Revised: 2008-03-27

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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

Effect of entrance-channel asymmetry on the isospin dependence of nucleon emission in heavy ion collisions

Corresponding author: ZUO Wei,

Received Date: 2007-07-24

Accepted Date: 2008-03-27

Available Online: 2008-07-05

Abstract:

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
isotopic reaction systems ¹³²Sn+¹²⁴Sn, ¹²⁴Sn+¹¹²Sn and ¹¹²Sn+¹¹²Sn 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=400MeV, and the sensitivity increases as the isospin asymmetry of the reaction system increases.

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Effect of entrance-channel asymmetry on the isospin dependence of nucleon emission in heavy ion collisions

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