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Production cross sections for the heaviest nuclei in complete fusion reactions induced by heavy ions

  • Production of Superheavy Elements and Nuclear Properties
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Abstract.

Production of the heaviest nuclei in complete fusion reactions induced by heavy ions has been considered in a systematic way in the framework of the conventional barrier passing model coupled with the statistical model. Available data on excitation functions for fission and production of evaporation residues (ER) in very asymmetric combinations induced by ions lighter than Ne on actinide target nuclei are described rather well in the framework of these models. The data allow one to adjust model parameters and to reveal the quasi-fission effect caused by the interaction with deformed target nuclei, which is manifested in the suppression of the ER production at sub-barrier energies. For reactions induced by Mg and heavier projectiles, quasi-fission is starting to suppress fusion (ER production) at energies above the Coulomb barrier. One has to introduce empirically the quantity of the fusion probability Pfus to reproduce the ER excitation functions in the framework of the conventional approach. The exponential dependence of Pfus on the combined fissility parameter (a similar parameter that was introduced for the extra-push energy scaling) was found in search for scaling for the Pfus values resulting from the data analysis.

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  1. Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, 141980, Russia

    R. N. Sagaidak

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  1. R. N. Sagaidak
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Sagaidak, R. Production cross sections for the heaviest nuclei in complete fusion reactions induced by heavy ions. Eur. Phys. J. D 45, 59–65 (2007). https://doi.org/10.1140/epjd/e2007-00160-3

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  • DOI: https://doi.org/10.1140/epjd/e2007-00160-3

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