Abstract
Evaporation residue measurements have been made for the40Ar+40Ca system at high incident energies,E Lab=161, 190, 236 and 273 MeV. A dynamical description of the fusion process is presented, where in a trajectory model both rotational and neck degrees-of-freedom are included. Using this model maximuml-values for fusion are determined and at high incident energies are found to be significantly lower than those found when using the more usual one-dimensional effective nucleus-nucleus potential. The fusion cross sections minus the fission component yields evaporation residue cross sections that are in good agreement with the data. Also, mass distributions of the evaporation residues compare well with statistical-decay model predictions. A comparison is made with the similarly mass-symmetric40Ca+40Ca system.
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Work supported by the Bundesministerium für Forschung und Technologie, Germany
We are very grateful to Professor F. Pühlhofer for making available his code CASCADE and for many helpful discussions. Also, we gratefully acknowledge the many useful comments given by Dr. H. Oeschler. Some of us (C.B., J.C., A.R. and G.S.) would like to thank the staff of the VICKSI facility for the kind hospitality given during their stay at the HMI. The numerical calculations were performed at the GSI computer facility. We thank the computer staff at GSI for their expert assistance and Mrs. A. Mruk for the careful typing of the manuscript.
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Carter, J., Brendel, C., Richter, A. et al. On the fusion dynamics of40Ar+40Ca — Fusion-fission and fusion-evaporation. Z Physik A 313, 57–67 (1983). https://doi.org/10.1007/BF02115843
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DOI: https://doi.org/10.1007/BF02115843