Microscopic Study on Dynamic Barrier in Fusion Reactions

WU Xi-Zhen; TIAN Jun-Long; WANG Ning; ZHAO Kai; LI Zhu-Xia

Chinese Physics C> 2004, Vol. 28> Issue(12) : 1317-1323

Microscopic Study on Dynamic Barrier in Fusion Reactions

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

Abstract
HTML
Reference
Related

PDF

Abstract：
in this paper we briefly review the fusion process of very heavy nuclear systems and some theoretical models. We propose a microscopic transport dynamic model, i.e. the improved Quantum Molecular Dynamic model, for describing fusion reactions of heavy systems, in which the dynamical behavior of the fusion barrier in heavy fusion systems has been studied firstly. We find that with the incident energy decreasing the lowest dynamic barrier is obtained which approaches to the adiabatic static barrier and with increase of the incident energy the dynamic barrier goes up to the diabatic static barrier. We also indicate that how the dynamical fusion barrier is correlated with the development of the configuration of fusion partners along the fusion path. Associating the single–particle potentials obtained at different stages of fusion with the Two center Shell Model,we can study the time evolution of the single particle states of fusion system in configuration space of single particle orbits along the fusion path.

References

[1]

.Hofmann S , Mu: nzenberg G. Rev. Mod. Phys. , 2000, 72: 7332. Armbruster P. Ann. Rev. Nucl. Part . Sci. , 1985, 35: 135; 2000, 50:4113. Oganessian Yu Ts et al. Phys. Rev. , 2001, C63: 0113014. Denisov V Yu,Hofmann S. Phys. Rev. , 2000, C61: 0346065. Denisov V Yu. Prog. Part . Nucl. Phys. , 2001, 46: 3036. Denisov V Yu, No: renberg W. Eur. Phys. J. , 2002, A15: 3757. Swiatecki W J. Phys. Scr. , 1981, 24: 113; Nucl. Phys. , 1982, A376:2758. Royer G, Remaud B. Nucl. Phys. , 1985, A444: 4779. Blocki H,Feldmier H, Swiatecki W J. Nucl. Phys. , 1986, A459: 14510. Abe Y et al. Acta Physica Polonica, 2003, B34: 209111. Abe Y, Shen C W, Kosenko G. in AIP conference proceedings 597 onNon-equilibrium and nonlinear dynamics in nuclear and other finite systems, Beijing 2001, edited by Z.Li, K. Wu, X. Wu, E. Zhao and F.Sakata ( American Inst itute of Physics) P. 20912. Abe Y et al. nucl-th/ 030801713. Aritomo Y et al . Phys. Rev. , 1997, C55: 1011; Phys. Rev. , 1999,C59: 79614. Shen C, Kosenko G,Abe Y. Phys. Rev. , 2002, C66: 061602( R)15. Volkov V V, Akad I. Nauk SSSR, Ser. Fiz. , 1986, 50: 1879 ; Phys.Lett. , 1993, B319: 425; Phys. Rev. , 1995, C51: 263516. Adamian G G, Antonenko N V, Scheid W. Nucl. Phys. , 1997, A618:176; 1997, A627: 361; 2000, A678: 24; Phys. Rev. , 2003, C68:03460117. Diaz-Torres A et al. Phys. Lett . , 2000, B481: 22818. Adamian G G et al. Nucl . Phys. , 2000, A671: 23319. Zagrebaev V I. Phys. Rev. , 2001, C64: 03460620. Proceedings of the Symposium on Nucl ear Clust ers edited by Rost islav Jolos and Werner Scheid ( EP Syst ema, Debrecen,Hungary, 2003)21. WANG N, LI Z X, WU X Z. Phys. Rev. , 2002, C65: 064608; 2002,C67: 02460422. WANG N, LI Z X, WU X Z. Phys. Rev. C, to be published23. Feldmeier H, Schnack J. Rev. Mod. Phys. , 2000, 72: 65524. Hartnack Ch et al . Nucl. Phys. , 1989, A495: 303LI Z X, Hartnack Ch, Stoecker H, Greiner W. Phys. Rev. , 1991,C40: 82425. Massimo Papa, Toshiki Maruyama, Aldo Bonasera. Phys. Rev. , 2001,C64: 02461226. Slater J S. Phys. Rev. , 1951, C81: 8527. Titin-Schnaider C, Quentin P. Phys. Lett. , 1974, B49: 39728. Bartel J, Bencheikh K. Eur. Phys. J. , 2002, A14: 17929. Denisov V Yu, Norenberg W. Eur. Phys. , 2002, J. A15: 37530. Myers W D and Swiatecki W J. Phys. Rev. , 2000, C62: 044610;Blocki J et al. Ann. Phys. ( N. Y. ) , 1977, 105: 42731. Maruhn J A. , Greiner W. Z. Phys. , 1972, 251: 431; WU X Z,Maruhn J A, Greiner W. Z. Phys. , 1989, A334: 207

[1]	ZHAI Ji-Yuan , TANG Chuan-Xiang , ZHENG Shu-Xin . Experimental Study on the Beam Dynamics of Micro-Pulse Electron Gun. Chinese Physics C, 2006, 30(S1): 99-101.
[2]	ZHAO Kai , LI Zhu-Xia , WU Xi-Zhen , WANG Ning , ZHANG Ying-Xun , TIAN Jun-Long , ZHANG Huan-Qiao , LIU Zu-Hua . Dynamic Model Study of Fusion Reactions for ^40,48Ca+^90,96Zr. Chinese Physics C, 2006, 30(1): 26-31.
[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]	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.
[5]	CHEN Yong , HUANG Wen-Hui , TANG Chuan-Xiang . Dynamics Study of the Rhodotron Accelerator. Chinese Physics C, 2005, 29(2): 180-185.
[6]	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.
[7]	TIAN Jun-Long , WU Xi-Zhen , LI Zhu-Xia , WANG Ning , LIU Fu-Hu . Study on Fusion Potential Barrier in Heavy Ion Reactions Based on the Dynamical Model. Chinese Physics C, 2004, 28(7): 725-732.
[8]	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.
[9]	ZHANG Ying-Xun , WU Xi-Zhen , LI Zhu-Xia . Dynamical Behaviors of Liquid-Gas Phase Transition in Nuclei. Chinese Physics C, 2002, 26(10): 1065-1071.
[10]	ZENG XiangHua , ZHANG FengShou , LUO YiXiao . Study on the Decay Dynamics of Hot Nuclei. Chinese Physics C, 2000, 24(6): 535-540.
[11]	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.
[12]	Liu Jianye , Zhang Shaoguang . Dynamical Study on Processes of Intermediate-Energy Heavy Ion Collisions. Chinese Physics C, 1995, 19(1): 53-58.
[13]	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.
[14]	LIU Jian-Ye , GE Yu-Cheng . Nuclear Matter Density,Collision Number and Entropy in Dynamics Process of Intermediate High Energy Heavy Ion Collision. Chinese Physics C, 1991, 15(6): 556-561.
[15]	LI Guang-Hua , HE Hui-Yong . THE U(90) DYNAMICAL SYMMETRY IN LIGHT NUCLEI. Chinese Physics C, 1990, 14(2): 164-170.
[16]	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.
[17]	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.
[18]	FENG Ren-Fa , WU Xi-Zhen , ZHANG Xi-Zhen , ZHUO Yi-Zhong . MICROSCOPIC CALCULATION OF THE INERTIA IN HEAVY NUCLEI. Chinese Physics C, 1984, 8(1): 81-90.
[19]	WG SHU-HIUNG . BEAM DYNAMICS DESIGN STUDY FOR RFQ LINAC. Chinese Physics C, 1982, 6(4): 428-434.
[20]	HE GUO-ZHU . NUCLEAR CHARGE DYNAMICS AND NUCLEAR POTENTIALS. Chinese Physics C, 1981, 5(2): 227-231.

Access

Get Citation

WU Xi-Zhen, TIAN Jun-Long, WANG Ning, ZHAO Kai and LI Zhu-Xia. Microscopic Study on Dynamic Barrier in Fusion Reactions[J]. Chinese Physics C, 2004, 28(12): 1317-1323.

WU Xi-Zhen, TIAN Jun-Long, WANG Ning, ZHAO Kai and LI Zhu-Xia. Microscopic Study on Dynamic Barrier in Fusion Reactions[J]. Chinese Physics C, 2004, 28(12): 1317-1323. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(4816)
PDF Downloads(622)
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

Microscopic Study on Dynamic Barrier in Fusion Reactions

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 Nclear 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: in this paper we briefly review the fusion process of very heavy nuclear systems and some theoretical models. We propose a microscopic transport dynamic model, i.e. the improved Quantum Molecular Dynamic model, for describing fusion reactions of heavy systems, in which the dynamical behavior of the fusion barrier in heavy fusion systems has been studied firstly. We find that with the incident energy decreasing the lowest dynamic barrier is obtained which approaches to the adiabatic static barrier and with increase of the incident energy the dynamic barrier goes up to the diabatic static barrier. We also indicate that how the dynamical fusion barrier is correlated with the development of the configuration of fusion partners along the fusion path. Associating the single–particle potentials obtained at different stages of fusion with the Two center Shell Model,we can study the time evolution of the single particle states of fusion system in configuration space of single particle orbits along the fusion path.

HTML

Reference (1)

Microscopic Study on Dynamic Barrier in Fusion Reactions

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article