EPJ Web of Conferences 2, 08003 (2010)
https://doi.org/10.1051/epjconf/20100208003

Nuclear dissipation effects on fission and evaporation in systems of intermediate fissility

¹ Istituto Nazionale di Fisica Nucleare, Via Cinthia, 80126 Napoli, Italy
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

^a e-mail: nadtochy@na.infn.it

Abstract

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.