Nuclear dissipation effects on fission and evaporation in systems of intermediate fissility
Istituto Nazionale di Fisica Nucleare, Via Cinthia,
2 Istituto Nazionale di Fisica Nucleare and Dipartimento di Scienze Fisiche, Universitá di Napoli “Federico II”, Via Cinthia, 80126 Napoli, Italy
3 Laboratori Nazionali di Legnaro dell’Istituto Nazionale di Fisica Nucleare, Legnaro (Padova), Italy
4 Istituto Nazionale di Fisica Nucleare and Dipartimento di Fisica, Firenze, Italy
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The systems of intermediate fissility 132Ce and 158Er have been studied experimentally and theoretically in order to investigate the dissipation properties of nuclear matter. Cross sections of fusion-fission and evaporation residues channels together with charged particles multiplicities in both channels, their spectra, angular correlations and mass-energy distribution of fission fragments have been measured. Theoretical analysis has been performed using multi-dimensional stochastic approach with realistic treatment of particle evaporation. The results of analysis show that full one-body or unusually strong two-body dissipation allows to reproduce experimental data. No temperature dependent dissipation was needed.
© Owned by the authors, published by EDP Sciences, 2010