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Full text (en) Dissipative processes in 18O + 9Be and 18O + 181Ta reactions at Fermi energies
B. Erdemchimeg1,2, T. I. Mikhailova1, A. G. Artyukh1, G. Kaminski1,3, Yu. M. Sereda1,4, M. Colonna5, M. Di Toro5, H. H. Wolter6
1Joint Institute for Nuclear Research, Dubna, Moscow region, Russia
2Mongolian National University, NRC, Ulaanbaatar, Mongolia
3Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland
4Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
5Laboratorio Nazionale del Sud, Istituto Nazionale di Fisica Nucleare, Catania, Italy
6Faculty of Physics, University of Munich, Garching, Germany
Abstract: A study of peripheral nuclear collisions at Fermi energies with transport models is presented. It is motivated by experiments devoted to studying of isotopic yields in the reactions 18O on 9Be and 181Ta at E/A = 35 MeV measured at very forward angles. The data show a two-component structure, one centered at beam velocity ("direct component") and another at lower velocities ("dissipative component"). It is shown that the transport calculations describe the general features of the dissipative component of the reaction. In our calculations we take into account the evaporation of the excited, primary projectile-like residues due to statistical decay. This improves the comparison of the results of the calculations with experiment. We find substantially different behavior of the dissipative component in the reactions with light and heavy target.
Keywords: deep inelastic reactions, transport models, Fermi energy.
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