Real causes of apparent abnormal results in heavy ion reactions
1 Dipartimento di Fisica e di Scienze della Terra dell’Università di Messina, Salita Sperone 31, 98166, Messina, Italy
2 Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Catania, Italy
3 Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Russia
4 Institute of Nuclear Physics, Ulugbek, 100214, Tashkent, Uzbekistan
5 Kyungpook National University, 702-701, Daegu, Republic Korea
6 Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Italy
Published online: 2 June 2015
We study the effect of the static characteristics of nuclei and dynamics of the nucleus-nucleus interaction in the capture stage of reaction, in the competition between quasifission and complete fusion processes, as well as the angular momentum dependence of the competition between fission and evaporation processes along the de-excitation cascade of the compound nucleus. The results calculated for the mass-asymmetric and less mass-asymmetric reactions in the entrance channel are analyzed in order to investigate the role of the dynamical effects on the yields of the evaporation residue nuclei. We also discuss about uncertainties at the extraction of such relevant physical quantities as Γn/Γtot ratio or also excitation functions from the experimental results due to the not always realistic assumptions in the treatment and analysis of the detected events. This procedure can lead to large ambiguity when the complete fusion process is strongly hindered or when the fast fission contribution is large. We emphasize that a refined multiparameter model of the reaction dynamics as well as a more detailed and checked data analysis are strongly needed in heavy-ion collisions.
© Owned by the authors, published by EDP Sciences, 2015
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