Effect of Coulomb Interaction on Isospin Fractionation Process

GUO Wen-Jun; LIU Jian-Ye; XING Yong-Zhong

Chinese Physics C> 2004, Vol. 28> Issue(8) : 850-853

Effect of Coulomb Interaction on Isospin Fractionation Process

Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China2 Graduate School of the Chinese Academy of Sciences,Beijing 100039,China3 Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China4 Institute for the Theory of Modern Physics,Tianshui Normal College,Tianshui 741000,China

Abstract
HTML
Reference
Related

PDF

Abstract：
We studied the effect of Coulomb interaction on the isospin fractionation in intermediate energy heavy ion collisions by using isospin dependence quantum molecular dynamics model (IQMD).The results show that Coulomb interaction reduces the isospin fractionation process whatever the system mass,beam energy and system neutron proton ratio are,because Coulomb interaction is repulsive for proton.The more bound protons became free under Coulomb interaction,which produces neutron poor gas phase and neutron rich liquid phase,thus isospin fractionation degree is weaken.On the contrary,the symmetry potential is repulsive for neutrons and attractive for protons in neutron rich systems.The bound neutrons more than protons became free,which produces neutron rich gas phase and neutron poor liquid phase,so the isospin fractionation degree increases.Total effects of the Coulomb interaction and symmetry potential make the isospin fractionation degree to be in between those induced by themselves individually.

References

[1]

. LIU Jian-Ye, GUO Wen-Jun, XING Yong-Zhong et al. Nucl. Phys. ,2003, A726: 1232. LIU Jian-Ye, XING Yong-Zhong, GUO Wen-Jun et al. Chin.Phys. Lett . ,2003, 20( 5) : 6433. LI B A. Phys. Rev. Lett . , 2000, 85: 42214. Baran V,Colonna M, Toro M Di .Nucl. Phys. , 2002, A 703: 603-6325. Bertsch G F, Gupta S D.Phys. Rep. , 1988, 160: 1991-2336. LIU Hang, LIU Jian-Ye. Z. Phys. , 1996. A345: 3117. LIU Jian-Ye, GUO Wen-Jun, WANG Shun-Jin et al . Phys. Rev. Lett . ,2001, 86( 6) : 975 -9788. YANG Yan-Fang, LIU Jian-Ye, ZUO Wei et al. Chin.Phys. Lett . , 2001,18( 8) : 1040 -10439. LIU Jian-Ye, XING Yong-Zhong, GUO Wen-Jun et al. Chin. Phys.Lett. ,2002, 19( 8) : 107810. LIU Jian-Ye, GUO Wen-Jun, XING Yong-Zhong et al. Phys. Lett. ,2002, B540: 21311. LIU Jian-Ye et al.Nucl .Phys. , 2001, A687: 47512. LI B A, KO C M, Bauer W. Int . J. Mod. Phys. , 1998, E7: 14713. Alkahzov G et al. Nucl. Phys. , 1977, A280: 365

[1]	HAO Huan-Feng , XING Yong-Zhong , LIU Jian-Ye . Influence of Isospin\, Dependence\, of\, Nucleon-Nucleon\, Cross\, Section\, and\, Momentum\, DependentInteraction on the Isoscaling in Intermediate Energy Collisions. Chinese Physics C, 2007, 31(7): 651-654.
[2]	GUO Yan-Qing , REN Zhong-Zhou . Isospin Effect on Level Spacing of N=9 Isotones. Chinese Physics C, 2007, 31(4): 361-365.
[3]	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.
[4]	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.
[5]	YE Wei . Dependence of Isospin Effect in the Multiplicity of Pre-Scission Particles on the Angular Momentum. Chinese Physics C, 2004, 28(6): 611-616.
[6]	YE Wei . Effects of Isospin on Multiplicity of Prescission Particles of Light Fissioning Systems. Chinese Physics C, 2004, 28(1): 73-77.
[7]	XING Yong-Zhong , LIU Jian-Ye , GUO Wen-Jun . Liquid-Gas Phase Transition and Isospin Fractionation in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2004, 28(6): 607-610.
[8]	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.
[9]	ZUO Wei , Lombardo U , LIU Jian-Ye , LI Jun-Qing . Properties of Isospin Asymmetric Nuclear Matter and Extended BHF Approach(Ⅴ) Three -Body Force Effect on Single-Particle Potential. Chinese Physics C, 2003, 27(7): 585-589.
[10]	XING Yong-Zhong , LIU Jian-Ye , GUO Wen-Jun , ZUO Wei , DI Yu-Fang , LI Xi-Guo , LI Zeng-Hua . Isospin Effects on Fragmentation Process and Role of Momentum Dependent Interaction in Heavy Ion Collisions at Intermediate Energy. Chinese Physics C, 2003, 27(2): 130-134.
[11]	GUO Wen-Jun , LIU Jian-Ye , XING Yong-Zhong , ZUO Wei , LI Xi-Guo . Isospin Fractionation Process in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2003, 27(10): 897-900.
[12]	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.
[13]	YANG Yan-Fang , LIU Jian-Ye , GUO Wen-Jun , ZUO Wei , ZHAO Qiang . Importance of Momentum Dependence Interaction on the Isospin Effects of Two-Body Dissipation. Chinese Physics C, 2002, 26(4): 377-382.
[14]	GUO Wen-Jun , LIU Jian-Ye , YANG Yan-Fang , ZUO Wei , ZHAO Qiang . Importance of Momentum Dependence Interactionon the Isospin Dependence of the Mean Field. Chinese Physics C, 2002, 26(7): 690-695.
[15]	CHEN Lie-Wen , ZHANG Feng-Shou , MING Zhao-Yu , LI Wen-Fei , ZHU Zhi-Yuan . Isospin Dependence of Rotational Flow. Chinese Physics C, 2001, 25(4): 329-335.
[16]	ZHANG Feng-Shou , CHEN Lie-Wen , LI Wen-Fei , ZHU Zhi-Yuan . Isospin Dependence of Squeeze-out Flow. Chinese Physics C, 2001, 25(5): 412-416.
[17]	LI Wen-Fei , ZHANG Feng-Shou , CHEN Lie-Wen . On Isospin Excitation Energy. Chinese Physics C, 2001, 25(7): 668-673.
[18]	CHEN LieWen , ZHANG FengShou , JIN GenMing , LIU JianYe , ZHU ZhiYuan . Isospin Effects on Radial Expansion Flow. Chinese Physics C, 2000, 24(2): 153-159.
[19]	Wu Heyu , Xiao Zhigang , Li Zuyu , Wang Hpmgweo , Duan Limin , Zhang Baoguo , Liu Yongying , Wang Sufang , Jin Genming , Xiao Guoqing , Guo Zhongyan , Zhu Yongtai . Isospin Effect on the Emission Mechanism of Hot Nuclei in 35MeV/u ⁴⁰Ar +¹¹²Sn/¹²⁴Sn Reactions. Chinese Physics C, 1999, 23(11): 1115-1118.
[20]	CHEN Xin-Yi , WU Shi-Shu . 1s-0d EFFECTIVE INTERACTIONS OF ISOSPIN TRIPLET AND ¹⁸Ne-¹⁸O COULOMB DISPLACEMENT ENERGIES. Chinese Physics C, 1989, 13(1): 50-55.

Access

Get Citation

GUO Wen-Jun, LIU Jian-Ye and XING Yong-Zhong. Effect of Coulomb Interaction on Isospin Fractionation Process[J]. Chinese Physics C, 2004, 28(8): 850-853.

GUO Wen-Jun, LIU Jian-Ye and XING Yong-Zhong. Effect of Coulomb Interaction on Isospin Fractionation Process[J]. Chinese Physics C, 2004, 28(8): 850-853. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2003-11-29
Revised: 1900-01-01

Article Metric

Article Views(2474)
PDF Downloads(524)
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

Effect of Coulomb Interaction on Isospin Fractionation Process

Corresponding author: GUO Wen-Jun,

Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China2 Graduate School of the Chinese Academy of Sciences,Beijing 100039,China3 Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China4 Institute for the Theory of Modern Physics,Tianshui Normal College,Tianshui 741000,China

Received Date: 2003-11-29

Accepted Date: 1900-01-01

Available Online: 2004-08-05

Abstract: We studied the effect of Coulomb interaction on the isospin fractionation in intermediate energy heavy ion collisions by using isospin dependence quantum molecular dynamics model (IQMD).The results show that Coulomb interaction reduces the isospin fractionation process whatever the system mass,beam energy and system neutron proton ratio are,because Coulomb interaction is repulsive for proton.The more bound protons became free under Coulomb interaction,which produces neutron poor gas phase and neutron rich liquid phase,thus isospin fractionation degree is weaken.On the contrary,the symmetry potential is repulsive for neutrons and attractive for protons in neutron rich systems.The bound neutrons more than protons became free,which produces neutron rich gas phase and neutron poor liquid phase,so the isospin fractionation degree increases.Total effects of the Coulomb interaction and symmetry potential make the isospin fractionation degree to be in between those induced by themselves individually.

HTML

Reference (1)

Effect of Coulomb Interaction on Isospin Fractionation Process

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article