Towards a unified description of evaporation-residue fusion cross-sections above the barrier
1 Subatech, EMN-IN2P3/CNRS-Université de Nantes - F-44 307 Nantes, France
2 Ruđer Bošković Institute - HR-10 002 Zagreb, Croatia
Received: 17 September 2013
Accepted: 15 October 2013
A meticulous study of nearly 300 fusion-evaporation cross-section data reveals that, when properly scaled, fusion excitation function complies with a universal homographic law which is, within experimental errors, reaction system independent. From such complete and summed complete and incomplete fusion excitation functions are extracted the limiting energy for the complete fusion and the main characteristics (onset, maximum and vanishing) of the incomplete fusion. The DYWAN microscopic transport model correctly predicts the incomplete fusion cross-section for incident energies and suggests that the nuclear transparency is at the origin of fusion disappearance.
PACS: 25.70.Jj – Fusion and fusion-fission reactions / 25.70.-z – Low and intermediate energy heavy-ion reactions
© EPLA, 2013