Study on Fusion Potential Barrier in Heavy Ion Reactions Based on the Dynamical Model

TIAN Jun-Long; WU Xi-Zhen; LI Zhu-Xia; WANG Ning; LIU Fu-Hu

Chinese Physics C> 2004, Vol. 28> Issue(7) : 725-732

Study on Fusion Potential Barrier in Heavy Ion Reactions Based on the Dynamical Model

China Institute of Atomic Energy,Beijing 102413,China2 Institute of Modern Physics,Shanxi Teachers University,Linfen 041004,China3 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China4 Institute of Theoretical Physics,CAS,Beijing 100080,China

Abstract
HTML
Reference
Related

PDF

Abstract：
Based on an improved quantum molecular dynamics model the static and dynamic potential in the entrance channel of synthesis of superheavy nuclei are studied. The dependence of the static potential (and driving potential) on mass-asymmetry is obtained. From this study we find out that the mass-symmetric system seems to be difficult to fuse and the fusing system with the largest driving potential could be the optimal choice of the projectile-target combination. By comparing the static potential barrier with the dynamic one we find that the latter one is lower than former one obviously, and that the dynamical potential barrier is entrance energy dependent. The maximum and minimum of dynamic potential barriers approach to the diabatic (sudden approximation) and the adiabatic static potential barriers, respectively.

References

[1]

. Bass R. Nuclear Reactions with Heavy Ion. Springer-Verlag, Berlin,1980. 2832. Denisov V Y, Norenberg W. Eur. Phys. J ., 2002. A15 : 3753. Feshbach H. Reflection on the PILACWorkshop. in : John Sons. Theoretical Nuclear Physics : Nuclear Reactions. New York : AIP Conf .Proc., 1992. 2474. Mahaux C, Weidenmuller H A. Shell2Model Approach to Nuclear Reactions. Amsterdam: North-Holland Publishing Co., 1969. 205. Skorka S J, Schomburg W K, Borges AMet al . Effect of Neutron Trans-fer and Inelastic Scattering in Subbarrier Fusion. in :Furuno Kand Kish-imoto T. Heavy Ion Fusion Reactions. TSUKUBA: World Scientific Publishing Co. Pte. Ltd., 1985. 36. WANG Ning, WU XiZhen, LI ZhuXia. Phys. Rev., 2002, C65 :064608 ; Phys. Rev., 2003, C67 : 0246047. Bass R. Nucl . Phys., 1974, A213 : 458. Kroppe, Nix, Sierk. Atomoic Data. Nucl . Data, 1993, 59 : 1859. Myers W D, Swiatecki W J . Phys. Rev., 2000, C62 : 04461010. Denisov V Y. Phys. Lett ., 2002, B526 : 31511. Giardina G, Agostino P D, Fazio G et al . Pramana-J . Phys., 1999,53 : 40912. Zagrebaev V I. Journal of Nuclear and Radiochemical Science, 2002,3 : 1313. Cherepanov E A. Pramana-J . Phys., 1999, 53 : 61914. Diaz-Torres A, Adamian G G, Antonenko NV. Phys. Lett ., 2000,B481 : 22815. Volkov V V. Acta Physica Polonica, 1999, B30 : 1517

[1]	X.Wu , D.Cole , M.Doleans , G.Machicoane , F.Marti , P.Miller , J.Stetson , M.Steiner , P.Zavodszky , Q.Zhao . Beam Dynamics Studies of ECR Injections for the Coupled Cyclotron Facility at NSCL. Chinese Physics C, 2007, 31(S1): 196-200.
[2]	LI Xue-Qin , ZHANG Ying-Xun , TIAN Jun-Long , LI Zhu-Xia , WU Xi-Zhen , ZHU Li-Hua . Dynamic Study on Entrance-Channel Effects in Heavy-Ion Fusion Reactions. Chinese Physics C, 2006, 30(S2): 196-198.
[3]	TIAN Jun-Long , WU Xi-Zhen , LI Zhu-Xia . Study on Dynamic Fusion Barrier in Heavy-Ion Fusion Reactions. Chinese Physics C, 2006, 30(5): 428-434.
[4]	FENG Zhao-Qing , JIN Gen-Ming , ZHANG Feng-Shou , FU Fen , HUANG Xi . Dynamical Study on Fusion Mechanism near Coulomb Barrier. Chinese Physics C, 2005, 29(12): 1157-1161.
[5]	WU Xi-Zhen , TIAN Jun-Long , WANG Ning , ZHAO Kai , LI Zhu-Xia . Microscopic Study on Dynamic Barrier in Fusion Reactions. Chinese Physics C, 2004, 28(12): 1317-1323.
[6]	LIU Ling , LU Kun , BAO Jing-Dong . Dynamic Back-Streaming Effects around Fusion and Fission Barriers of Heavy Nuclei. Chinese Physics C, 2004, 28(8): 854-858.
[7]	Tan Jilian , Zhang Jinxia , Jin Genming , Zhang Huanqiao , Qian Xing , Liu Zuhua , Xu Jincheng . Bi—dimension Position Sensitive Detector Used in the Study of Fusion Fission of Heavy Ions at the Sub—Coulomb Barrier Energy Region. Chinese Physics C, 1997, 21(1): 8-14.
[8]	Chu Zili , Zheng Yuming , Wang Fei , Sa Benhao , Lu Zhongdao . Unified Dynamical Simulation of Kaon and PionProduction in Heavy Ion Collisions. Chinese Physics C, 1996, 20(5): 438-447.
[9]	Liu Hang , Liu Jianye , Zhang Shaoguang , Li Junqing . Multifragmentation Process in HIC Simulated by Modified Quantum Molecular Dynamics. Chinese Physics C, 1995, 19(11): 1040-1046.
[10]	Liu Jianye , Zhang Shaoguang . Dynamical Study on Processes of Intermediate-Energy Heavy Ion Collisions. Chinese Physics C, 1995, 19(1): 53-58.
[11]	Huang Xiaolin , Jiang Dongxing , Ye Yanlin , Liu Hongtao , Lu Xiting . The Dynamics of Linear Momentum Dissipation in the Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 1994, 18(2): 154-159.
[12]	Zeng Xianghua , Ge Lingxiao , Zuo Wei . The Relationship Between the Energy Storage and the Entrance Channel Dynamics in HIC. Chinese Physics C, 1994, 18(9): 842-847.
[13]	ZUO Wei , GE Ling-Xiao , ZHANG Feng-Shou . Heavy Ion Collision Dynamics in Fermi Domain (Ⅲ) Multifragmentation and Limiting Exciting Energy. Chinese Physics C, 1993, 17(7): 644-650.
[14]	LIU Jian-Ye , GE Yu-Cheng , GE Ling-Xiao . The Medium Effects in Dynamics Processes of the Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 1991, 15(1): 71-79.
[15]	PAN Feng , CAO Yu-Fang , PAN Zhen-Yong . An Investigation of G Pair Included Fermion Dynamical Symmetry Model for Medium and Heavy Mass Nuclei. Chinese Physics C, 1991, 15(7): 647-654.
[16]	GE Ling-Xiao , ZENG Xiang-Hua , LIU Jian-Ye , ZENG Bao-Sheng . THE EFFECT OF COMPRESSION AND THERMAL EXCITATION FOR FRAGMENTATION DYNAMICS PROCESS OF HIC. Chinese Physics C, 1990, 14(3): 278-281.
[17]	ZHANG Feng-Shou , GE Ling-Xiao . HEAVY ION COLLISION DYNAMICS IN FERMI DOMAIN (Ⅱ) DYNAMICS DEPENDENCE OF IMPACT PARAMETER. Chinese Physics C, 1990, 14(11): 1045-1050.
[18]	ZHANG Feng-Shou , GE Ling-Xiao . HEAVY ION COLLISION DYNAMICS IN FERMI DOMAIN (I) DYNAMICS DEPENDENCE OF ENERGY. Chinese Physics C, 1990, 14(6): 561-568.
[19]	ZHONG Ji-Quan , GE Ling-Xiao , LIU Jian-Ye , YU Xian . A DYNAMICAL METHOD IN DEEP IN ELASTIC COLLISION OF HEAVY IONS. Chinese Physics C, 1983, 7(5): 598-604.
[20]	HE GUO-ZHU . NUCLEAR CHARGE DYNAMICS AND NUCLEAR POTENTIALS. Chinese Physics C, 1981, 5(2): 227-231.

Access

Get Citation

TIAN Jun-Long, WU Xi-Zhen, LI Zhu-Xia, WANG Ning and LIU Fu-Hu. Study on Fusion Potential Barrier in Heavy Ion Reactions Based on the Dynamical Model[J]. Chinese Physics C, 2004, 28(7): 725-732.

TIAN Jun-Long, WU Xi-Zhen, LI Zhu-Xia, WANG Ning and LIU Fu-Hu. Study on Fusion Potential Barrier in Heavy Ion Reactions Based on the Dynamical Model[J]. Chinese Physics C, 2004, 28(7): 725-732. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2003-11-03
Revised: 1900-01-01

Article Metric

Article Views(3539)
PDF Downloads(544)
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

Study on Fusion Potential Barrier in Heavy Ion Reactions Based on the Dynamical Model

Corresponding author: WU Xi-Zhen,

China Institute of Atomic Energy,Beijing 102413,China2 Institute of Modern Physics,Shanxi Teachers University,Linfen 041004,China3 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China4 Institute of Theoretical Physics,CAS,Beijing 100080,China

Received Date: 2003-11-03

Accepted Date: 1900-01-01

Available Online: 2004-07-05

Abstract: Based on an improved quantum molecular dynamics model the static and dynamic potential in the entrance channel of synthesis of superheavy nuclei are studied. The dependence of the static potential (and driving potential) on mass-asymmetry is obtained. From this study we find out that the mass-symmetric system seems to be difficult to fuse and the fusing system with the largest driving potential could be the optimal choice of the projectile-target combination. By comparing the static potential barrier with the dynamic one we find that the latter one is lower than former one obviously, and that the dynamical potential barrier is entrance energy dependent. The maximum and minimum of dynamic potential barriers approach to the diabatic (sudden approximation) and the adiabatic static potential barriers, respectively.

HTML

Reference (1)

Study on Fusion Potential Barrier in Heavy Ion Reactions Based on the Dynamical Model

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article