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

Abstract
HTML
Reference
Related

PDF

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.

[1]	MAO Ying-Chen , YE Wei , REN Zhong-Zhou . Effect of Deformation on Isospin Effect of Pre-scission Particle Emission. Chinese Physics C, 2006, 30(5): 423-427.
[2]	LIU Jian-Ye , GUO Wen-Jun , Xing Yong-Zhong , LI Xi-Guo . Isospin Effect of Momentum Dependent Interaction in Heavy Ion Collisions. Chinese Physics C, 2005, 29(5): 456-460.
[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.
[9]	GUO Wen-Jun , LIU Jian-Ye , ZUO Wei , XING Yong-Zhong , LI Xi-Guo , LI Zeng-Hua . Isospin Effect of Neutron (Proton) Emission Number in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2002, 26(12): 1264-1270.
[10]	YANG Yan-Fang , LIU Jian-Ye , ZUO Wei , GUO Wen-Jun , ZHAO Qiang . Entrance Channel Dependence of the Isospin Effects of the Nuclear Stopping in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2001, 25(8): 765-771.
[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.

Access

Get Citation

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

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1900-01-01
Revised: 1900-01-01

Article Metric

Article Views(3034)
PDF Downloads(578)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
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.

HTML

Reference (1)

Isospin Effects on Pre-equilibrium NucleonEmission in Heavy Ion Collisions

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article