Isospin Effect in Intermediate Energy Heavy Ion Collisions

LI Zhu-Xia; ZHANG Ying-Xun; LI Qing-Feng; ZHAO Kai; WU Xi-Zhen

Chinese Physics C> 2004, Vol. 28> Issue(12) : 1343-1348

Isospin Effect in Intermediate Energy Heavy Ion Collisions

China Institute of Atomic Energy,Beijing 102413,China2 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,China3 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China

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Abstract：
The isospin effect in central and peripheral heavy–ion collisions at intermediate energies is studied by means of improved quantum molecular dynamics and isospin dependent quantum molecular model. it is shown that the influence of the density dependence of the symmetry potential on the average N/Z ratio of the products in central and peripheral reactions exhibits different character due to the different mechanism of particle emission. We find that the average N/Z ratio of emitted nucleons in neutron–rich heavy ion collisions is sensitive to the symmetry potential for both central and peripheral cases. furthermore, for peripheral neutron–rich heavy ion collisions, the N/Z ratio of intermediate mass fragments is also sensitive to the density dependence of the symmetry potential,which provides us with a useful probe to the symmetry potential.

References

[1]

.　Brown B A. Phys. Rev. Lett . ,2000 ,85 :52962.　Pearson J M, Aboussir Y, Putt A K. Nucl . Phys. ,1991 , A528 :13.　Matsui T. Nucl . Phys. ,1981 ,A370 :3654.　Rufa M et al . Phys. Rev. ,1988 ,C38 :3905.　Furnstahl R J , Tang H B , Serot B D. Phys. Rev. ,1995 ,C52 :13686.　Lee C H et al . Phys. Rev. ,1998 ,C57 :34887.　ZUO W, Bombaci I , Lombardo U. Phys. Rev. ,1999 ,C60 :0246058.　Li B A , Ko C M, Ren Z Z. Phys. Rev. Lett . ,1997 ,78 :16449.　Tsang MB et al . Phys. Rev. Lett . ,2001 ,86 :502310.　Baran V et al . Nucl . Phys. ,2002 ,A703 :60311.　LIU J Y et al . Phys. Lett . ,2002 ,B540 :21312.　WANG N , LI Z X, WU X Z. Phys. Rev. ,2001 ,C65 :064608 ;2002 ,C67 :02460413.　WANG N , LI Z X, WU X Z. Phys. Rev. ,C accepted14.　Papa M, Maruyama T, Bonasera A. Phys. Rev. ,2001 , C64 :02461215.　Cugnon J , L'Hte D , Vandermeulen J . Nucl . Instr. Metho. Phys.Res. ,1996 ,B111 :21516.　LI Q F , LI Z X. Phys. Rev. ,2001 , C64 :064612 ; Mod. Phys. Lett . ,2002 ,A17 :37517.　Souliots G A et al . Phys. Rev. Lett . ,2003 ,91 :022701

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[7]	XING Yong-Zhong , LIU Jian-Ye , GUO Wen-Jun , ZUO Wei , LI Xi-Guo . Role of Momentum Dependent Interaction on the Isospin Effects of Fragmentations and Dissipations at Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2002, 26(S1): 63-72.
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[10]	ZHAO Qiang , GUO Wen-Jun , LIU Jian-Ye , ZUO Wei , WANG Shun-Jin . Isospin Dependence of Preequilibrium Nucleon Emission in Intermediate Energy Heavy Ion Collision. Chinese Physics C, 2001, 25(3): 244-250.
[11]	ZHAO Qiang , CHEN Bo , LIU JianYe , ZHANG FengShou , WANG ShunJin , CHEN LieWen , ZUO Wei . Probable Observable of Isospin Dependent Nucleon-Nucleon Cross Section in Inter Mediate Energy Heavy Ion Collisions. Chinese Physics C, 2000, 24(5): 426-430.
[12]	CHEN Bo , ZHAO Qiang , LIU JianYe , ZHANG FengShou , WANG ShunJin , CHEN LieWen , ZUO Wei . A Sensitive Probe for Isospin-Dependent Nucleon-Nucleon Cross Section in Intermediate Energy Heavy Ion Collision. Chinese Physics C, 2000, 24(4): 326-330.
[13]	FANG DeQing , SHEN WenQing , FENG Jun , CAI XiangZhou , SU QianMin , MA YuGang . Isospin Effect of Fragmentation Reaction and Its Disappearance in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2000, 24(10): 949-954.
[14]	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.
[15]	Chen Liewen , Zhang Fengshou , Jin Genming . Isospin Effects on Balance Energy in HIC at Intermediate Energies. Chinese Physics C, 1999, 23(5): 469-474.
[16]	Chen Liewen , Zhang Fengshou , Zeng Xianghua , Jin Genming . Isospin Effects on Collective Flow in HIC at Intermediate Energies. Chinese Physics C, 1998, 22(11): 1035-1041.
[17]	Chen Liewen , Zhang Xiaodong , Ge Lingxiao . Isospin Effects on Pre-equilibrium NucleonEmission in Heavy Ion Collisions. Chinese Physics C, 1996, 20(12): 1091-1096.
[18]	Zhu Quanling , Ge Lingxiao , Zhang Xiaodong . Isospin Effects on Dynamics of Heavy Ion Collisions. Chinese Physics C, 1994, 18(9): 853-857.
[19]	LIU Jian-Ye , LI Jun-Qing , QIAO Wei-Min , CHEN Pei-Jun , SHEN Wen-Qing , TAN Nan-Hong . THE SHELL EFFECTS IN HEAVY ION COLLISIONS FOR LOW BOBARDMENT ENERGIES. Chinese Physics C, 1988, 12(6): 840-847.
[20]	GE Ling-Xiao , LIU Jian-Ye , WANG Shun-Jin . TWO-BODY EFFECT IN HEAVY ION COLLISION. Chinese Physics C, 1987, 11(5): 695-698.

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LI Zhu-Xia, ZHANG Ying-Xun, LI Qing-Feng, ZHAO Kai and WU Xi-Zhen. Isospin Effect in Intermediate Energy Heavy Ion Collisions[J]. Chinese Physics C, 2004, 28(12): 1343-1348.

LI Zhu-Xia, ZHANG Ying-Xun, LI Qing-Feng, ZHAO Kai and WU Xi-Zhen. Isospin Effect in Intermediate Energy Heavy Ion Collisions[J]. Chinese Physics C, 2004, 28(12): 1343-1348. shu

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Received: 2003-11-29
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 in Intermediate Energy Heavy Ion Collisions

Corresponding author: LI Zhu-Xia,

China Institute of Atomic Energy,Beijing 102413,China2 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,China3 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China

Received Date: 2003-11-29

Accepted Date: 1900-01-01

Available Online: 2004-12-05

Abstract: The isospin effect in central and peripheral heavy–ion collisions at intermediate energies is studied by means of improved quantum molecular dynamics and isospin dependent quantum molecular model. it is shown that the influence of the density dependence of the symmetry potential on the average N/Z ratio of the products in central and peripheral reactions exhibits different character due to the different mechanism of particle emission. We find that the average N/Z ratio of emitted nucleons in neutron–rich heavy ion collisions is sensitive to the symmetry potential for both central and peripheral cases. furthermore, for peripheral neutron–rich heavy ion collisions, the N/Z ratio of intermediate mass fragments is also sensitive to the density dependence of the symmetry potential,which provides us with a useful probe to the symmetry potential.

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Isospin Effect in Intermediate Energy Heavy Ion Collisions

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通讯作者: 陈斌, bchen63@163.com

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