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Fusion near the Coulomb barrier for the synthesis of heavy and superheavy elements: A theoretical approach

  • N. Bhatia
  • S. S. MalikEmail author
  • A. K. Jain
Original Article

Abstract.

The compound nucleus formation is considered as a two-step process of touching and subsequent tunneling of the projectile into the target. The deep minima in the potential energy curve are due to shell effects in the experimental binding energies and give possible target-projectile combinations for the synthesis of heavy and superheavy elements. The asymmetric channels thus obtained are in remarkable agreement with the known experimental channels. In our model, the colliding partners are first shown to be captured in the pocket behind the outer (touching) barrier and the composite system so formed finally tunnels through the inner (fusion) barrier to form the resulting compound nucleus. These calculations reveal the importance of the fusion barrier, which occur only for the asymmetric target-projectile combinations. The calculated fusion cross-sections show a reasonable comparison with the observed one-neutron evaporation residue cross-sections. An estimate of the excitation energy carried by the compound nucleus is also obtained from our model calculations.

PACS.

24.10.-i Nuclear-reaction models and methods 25.70.Gh Compound nucleus 25.70.Jj Fusion and fusion-fission reactions 25.60.Pj Fusion reactions 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  1. 1.Department of PhysicsG.N.D. UniversityAmritsarIndia
  2. 2.Department of PhysicsIndian Institute of Technology RoorkeeRoorkeeIndia

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