We are carrying out a research program with the 8πLP apparatus at the Laboratori Nazionali di Legnaro (Italy), aimed at studying fission dynamics in systems of intermediate fissility. These systems, compared to the heavier ones, are characterized by larger pre‐scission charged particle multiplicities as well as by comparable fission and evaporation residue cross sections. Therefore, the measurement of observables in both channels allows putting severe constraints on the models, in order to obtain more reliable information on the dynamics of the process. We present the results for the composite system 122Ce, produced at Ex = 122 MeV in 200 MeV 32S+100Mo reaction. The comparison of the data with the predictions of a dynamical model, based on 3‐D Langevin equations, indicates that full one‐body dissipation plays a dominant role in the fission process, with a viscosity parameter independent from the temperature and a fission delay of ∼ 25∗10−21 s.
Fission Dynamics In 132Ce Composite Nuclei At E^=122 MeV / Di Nitto, A.; Nadtochy, P. N.; Brondi, Augusto; LA RANA, Giovanni; Moro, RENATA EMILIA MARIA; Vardaci, Emanuele; Ordine, A.; Boiano, A.; Cinausero, M.; Prete, G.; Rizzi, V.; Gelli, N.; Lucarelli, F.; Knyazheva, G. N.; Kozulin, E. M.. - STAMPA. - 1175:(2009), pp. 346-350. (Intervento presentato al convegno 4th International Workshop on Nuclear Fission and Fission-Product Spectroscopy) [10.1063/1.3258248].
Fission Dynamics In 132Ce Composite Nuclei At E^=122 MeV
A. Di Nitto;BRONDI, AUGUSTO;LA RANA, GIOVANNI;MORO, RENATA EMILIA MARIA;VARDACI, EMANUELE;
2009
Abstract
We are carrying out a research program with the 8πLP apparatus at the Laboratori Nazionali di Legnaro (Italy), aimed at studying fission dynamics in systems of intermediate fissility. These systems, compared to the heavier ones, are characterized by larger pre‐scission charged particle multiplicities as well as by comparable fission and evaporation residue cross sections. Therefore, the measurement of observables in both channels allows putting severe constraints on the models, in order to obtain more reliable information on the dynamics of the process. We present the results for the composite system 122Ce, produced at Ex = 122 MeV in 200 MeV 32S+100Mo reaction. The comparison of the data with the predictions of a dynamical model, based on 3‐D Langevin equations, indicates that full one‐body dissipation plays a dominant role in the fission process, with a viscosity parameter independent from the temperature and a fission delay of ∼ 25∗10−21 s.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
