Isospin Effects on Pre-equilibrium NucleonEmission in Heavy Ion Collisions

Chen Liewen; Zhang Xiaodong; Ge Lingxiao

Chinese Physics C> 1996, Vol. 20> Issue(12) : 1091-1096

Isospin Effects on Pre-equilibrium NucleonEmission in Heavy Ion Collisions

Institute of Modem Physics,The Chinese Academy of Sciences,Lanzhou 730000

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Abstract：
The isospin-dependent symmetry energy,Coulomb energy and nucleon-nucleon cross sections are considered in the quantum molecular dynamics model. The influence of isospin effects on the emission of nucleons is discussed in the head-on collisions of the system ⁴⁰Ar+⁴⁰Ar at the incident energy of 25 MeV/u.It is observed that the ratio of neutron to proton of pre-equilibrium nucleons is higher than that of the reaction system and the symmetry energy enhances the emission of neutron but reduces the emission of proton,at the same time,that the isospin-dependent nucleon-nucleon cross sections favour the emission of both neutron and proton,but they seem to be more beneficial to the emission of proton.

References

[1]

D.Hilscher iet al/i,iPhys/i.iRev/i.,C36（1987）208.[2] DHilscher,inProc.ofaSpecialists's Meetingon Preequilibrium Nuclear Reactions,Semmering,Austria,10-12th,Feb1988.[3] DPolster iet al/i.,in Book of abstracts,International Noclear Physics Conference,Wieshaden Germany,July26-Aug.1,1992,p3.3.8.[4] 朱全伶、葛凌霄、张晓东，高能物理与核物理，18（1994）853.[5] 朱全伶、葛凌霄、李祝霞，高能物理与核物理，16（1992）658.[6] K.Chen iet al/i,iPhys/i iRev/i.,166（1968）949.[7] 葛凌霄，中能重离子碰撞动力学，中科院近物所研究生讲义，p264[8] A.玻尔，B.R.莫特逊，原子核结构，第一卷，第二分册，科学出版社，1976,p182.[9] Bao-AnLi,J #934; rgen Randrup,Probing isospin dependent reactinn dynamics using preequilibrium Nucleons,iPhys/i.iRev/i.,C,to be published.

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[3]	XING Yong-Zhong , LIU Jian-Ye , GUO Wen-Jun . Isospin Effects in the Isospin Fractionation Process in Intermediate Energy HeavyIon Collisions. Chinese Physics C, 2004, 28(4): 403-407.
[4]	LI Zhu-Xia , ZHANG Ying-Xun , LI Qing-Feng , ZHAO Kai , WU Xi-Zhen . Isospin Effect in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2004, 28(12): 1343-1348.
[5]	YE Wei . Isotopic Effects in Prescission Particle Emission. Chinese Physics C, 2003, 27(3): 233-237.
[6]	HU Rong-Jiang , WU He-Yu , JIN Gen-Ming , ZHU Yong-Tai , LI Song-Lin , XIAO Zhi-Gang , WANG Hong-Wei , DUAN Li-Min , LI Zu-Yu , YIN Xu , WANG Su-Fang , ZHANG Bao-Guo , WEI Zhi-Yo , , , . Isospin Effect of Charged Particle Multiplicity in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2003, 27(11): 990-994.
[7]	LI Qing-Feng , LI Zhu-Xia . Probing Equilibration in HICs and Symmetry Energy by Using Isospin-Related Observables. Chinese Physics C, 2002, 26(9): 926-932.
[8]	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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[11]	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.
[12]	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.
[13]	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.
[14]	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.
[15]	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.
[16]	Lu Zhongdao , Ye Wei , Shen Wenqing . Collective Rotation Effect in Heavy Ion Collision and the Characteristics of Reaction. Chinese Physics C, 1999, 23(10): 1010-1014.
[17]	Chen Liewen , Zhang Fengshou , Jin Genming . Isospin Effects on Balance Energy in HIC at Intermediate Energies. Chinese Physics C, 1999, 23(5): 469-474.
[18]	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.
[19]	Li Junqing , Yuan Xiuqing , Liu Jianye , Zhu Jieding . Behavior of Individual Nucleon in Intermediate Energy Heavy Ion Reactions. Chinese Physics C, 1996, 20(9): 839-846.
[20]	Zhu Quanling , Ge Lingxiao , Zhang Xiaodong . Isospin Effects on Dynamics of Heavy Ion Collisions. Chinese Physics C, 1994, 18(9): 853-857.

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Chen Liewen, Zhang Xiaodong and Ge Lingxiao. Isospin Effects on Pre-equilibrium NucleonEmission in Heavy Ion Collisions[J]. Chinese Physics C, 1996, 20(12): 1091-1096.

Chen Liewen, Zhang Xiaodong and Ge Lingxiao. Isospin Effects on Pre-equilibrium NucleonEmission in Heavy Ion Collisions[J]. Chinese Physics C, 1996, 20(12): 1091-1096. shu

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Received: 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 Effects on Pre-equilibrium NucleonEmission in Heavy Ion Collisions

Corresponding author: Chen Liewen,

Institute of Modem Physics,The Chinese Academy of Sciences,Lanzhou 730000

Received Date: 1900-01-01

Accepted Date: 1900-01-01

Available Online: 1996-12-05

Abstract: The isospin-dependent symmetry energy,Coulomb energy and nucleon-nucleon cross sections are considered in the quantum molecular dynamics model. The influence of isospin effects on the emission of nucleons is discussed in the head-on collisions of the system ⁴⁰Ar+⁴⁰Ar at the incident energy of 25 MeV/u.It is observed that the ratio of neutron to proton of pre-equilibrium nucleons is higher than that of the reaction system and the symmetry energy enhances the emission of neutron but reduces the emission of proton,at the same time,that the isospin-dependent nucleon-nucleon cross sections favour the emission of both neutron and proton,but they seem to be more beneficial to the emission of proton.

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Isospin Effects on Pre-equilibrium NucleonEmission in Heavy Ion Collisions

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