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《中国物理C》（英文）编辑部
2024年10月30日
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

  • 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.
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    [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

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

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