Neutron excess in analytical expressions for fusion barrier parameters

  • N. G. NicolisEmail author


The neutron excess dependence of heavy-ion fusion barriers is investigated, guided by predictions of different ion-ion potentials. We develop phenomenological expressions for the fusion barrier radii and heights, involving both the entrance channel mass asymmetry and neutron excess of the projectile and target. Compared to commonly used formulas, the developed expressions reproduce theoretical barrier parameters with a higher accuracy. Furthermore, they provide a means to assess the importance of the neutron excess degree of freedom implied by each potential.


Entrance Channel Develop Expression Fusion Barrier Barrier Parameter Mass Asymmetry 
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  1. 1.
    Proceedings of the Fourth International Conference on Radioactive Nuclear Beams, Omiya, Japan, 3-7 June, 1996, edited by S. Kubono, T. Kobayashi, I. Tanihata, Nucl. Phys. A 616 (1997).Google Scholar
  2. 2.
    Proceedings of the International Workshop on Fusion Dynamics at the Extremes, Dubna, Russia, 25-27 May, 2000, edited by Y.T. Oganessian, V.I. Zagrebaev (World Scientific, 2001).Google Scholar
  3. 3.
    L.C. Vaz, J.M. Alexander, G.R. Satchler, Phys. Rep. 69, 373 (1981).CrossRefGoogle Scholar
  4. 4.
    D.G. Kovar, D.F. Geesaman, T.H. Braid, Y. Eisen, W. Henning, T.R. Ophel, M. Paul, K.E. Rehm, S.J. Sanders, P. Sperr, J.P. Schiffer, S.L. Tabor, S. Vigdor, B. Zeidman, F.W. Prosser jr., Phys. Rev. C 20, 1305 (1979).CrossRefGoogle Scholar
  5. 5.
    R.K. Puri, R.K. Gupta, Phys. Rev. C 45, 1837 (1992).CrossRefGoogle Scholar
  6. 6.
    R. Arora, R.K. Puri, R.K. Gupta, Eur. Phys. J. A 8, 103 (2000).CrossRefGoogle Scholar
  7. 7.
    P.R. Christensen, A. Winther, Phys. Lett. B 65, 19 (1976).CrossRefGoogle Scholar
  8. 8.
    R.K. Puri, M.K. Sharma, R.K. Gupta, Eur. Phys. J. A 3, 277 (1998).CrossRefGoogle Scholar
  9. 9.
    J.A. Christley, C.H. Dasso, S.M. Lenzi, M.A. Nagarajan, A. Vitturi, Nucl. Phys. A 587, 390 (1995).CrossRefGoogle Scholar
  10. 10.
    T.D. Thomas, Phys. Rev. 116, 703 (1959).CrossRefGoogle Scholar
  11. 11.
    R.A. Broglia, A. Winther, Heavy Ion Reactions, Vol. 1 (The Benjamin/Cummings Publishing Company, Inc., Reading, Massachusetts, 1981).Google Scholar
  12. 12.
    J. Blocki, J. Randrup, W.S. Swiatecki, C.F. Tsang, Ann. Phys. (N.Y.) 105, 427 (1977).Google Scholar
  13. 13.
    J. Randrup, Nucl. Instrum. Methods 146, 213 (1977).CrossRefGoogle Scholar
  14. 14.
    H.J. Krappe, J.R. Nix, A.J. Sierk, Phys. Rev. Lett. 42, 215 (1979).CrossRefGoogle Scholar
  15. 15.
    H.J. Krappe, J.R. Nix, A.J. Sierk, Phys. Rev. C 20, 992 (1979).CrossRefGoogle Scholar
  16. 16.
    P. Möller, J.R. Nix, Nucl. Phys. A 361, 117 (1981).CrossRefGoogle Scholar
  17. 17.
    H. Ngô, Ch. Ngô, Nucl. Phys. A 348, 140 (1980).CrossRefGoogle Scholar

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© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.Department of PhysicsThe University of IoanninaIoanninaGreece

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