Elsevier

Nuclear Physics A

Volume 441, Issue 2, 5 August 1985, Pages 316-343
Nuclear Physics A

Fusion probability of symmetric heavy, nuclear systems determined from evaporation-residue cross sections

https://doi.org/10.1016/0375-9474(85)90036-3Get rights and content

Abstract

Cross sections were measured for the formation of evaporation residues in 48Ca-, 86Kr- and 124 Sn-induced reactions with Yb, Sb and Zr isotopes. For the nearly symmetric systems, the energy dependence of the fusion probability in central collisions was determined. The fusion probability at the expected fusion barrier as calculated from a one-dimensional heavy-ion potential was found to be reduced by several orders of magnitude. The fusion cross sections increase gradually, and only at energies appreciably above the expected fusion barrier the major part of the cross section of central collisions leads to fusion. The observed hindrance of the fusion process is compared with model predictions.

References (72)

  • L.C. Vaz et al.

    Phys. Reports

    (1981)
  • H. Sann et al.

    Phys. Rev. Lett.

    (1981)
  • H. Gäggeler et al.

    Z. Phys.

    (1984)
  • S. Bjørnholm et al.

    Nucl. Phys.

    (1982)
  • K.T.R. Davies et al.

    Phys. Rev.

    (1983)
  • W. Nörenberg

    Phys. Lett.

    (1981)
  • W. Cassing et al.

    Nucl. Phys.

    (1983)
  • C.-C. Sahm et al.

    Z. Phys.

    (1984)
  • H.-G. Clerc et al.

    Nucl. Instr.

    (1973)
  • K.-H. Schmidt et al.

    Nucl. Phys.

    (1979)
  • K. Braune et al.

    GSI annual report GSI-J-1-77

    (1977)
  • V.S. Nikolaev et al.

    Sov. Phys. Techn. Phys.

    (1971)
  • K.-H. Schmidt et al.

    Z. Phys.

    (1981)
  • C.H. Dasso et al.

    Nucl. Phys.

    (1983)
  • C.H. Dasso et al.

    Nucl. Phys.

    (1983)
  • R.A. Broglia et al.

    Phys. Lett.

    (1983)
  • M.J. Rhoades-Brown et al.

    Phys. Lett.

    (1984)
  • R. Bass
  • W. Reisdorf
  • S. Cohen et al.

    Ann. of Phys.

    (1974)
  • H.J. Krappe et al.

    Phys. Rev.

    (1979)
  • A.V. Ignatyuk et al.

    Sov. J. Nucl. Phys.

    (1975)
  • D.L. Hill et al.

    Phys. Rev.

    (1953)
  • D. Berdichevsky, W. Nörenberg and A. Lukasiak, to be...
  • M. Beckerman et al.

    Phys. Rev. Lett.

    (1980)
  • R.G. Stokstad et al.

    Z. Phys.

    (1980)
  • G.M. Berkowitz et al.

    Phys. Rev.

    (1983)
  • W. Reisdorf et al.

    Phys. Rev. Lett.

    (1982)
  • W. Reisdorf et al.

    GSI preprint GSI-84-61

    (1984)

    Nucl. Phys.

    (1985)
  • R. Bock et al.

    Nucl. Phys.

    (1982)
  • W. Westmeier et al.

    Phys. Lett.

    (1982)
  • W.J. Swiatecki

    Phys. Scripta

    (1981)
  • W.J. Swiatecki

    Nucl. Phys.

    (1982)
  • H. Feldmeier
  • J.R. Nix et al.

    Phys. Rev.

    (1977)
  • D.H.E. Gross et al.

    Z. Phys.

    (1981)
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    Supported by the Bundesministerium für Forschung und Technologie, Federal Republic of Germany.

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