Charged-particles in coincidence with fission fragments (FF) and evaporationresidues (ER) have been measured for the system 180-MeV 32S + 109Ag leading to the composite system 141Eu at the excitation energy Ex 90 MeV. Energy spectra and multiplicities in both channels have been compared to the predictions of the statistical model by using the code PACE2. The best overall agreement was obtained, by using af /aν=1.12, a fission delay 12 < τd < 14 ( x 10−21s) and reduced alpha barriers in the relevant J-region for the fission channel. In addition to pre-scission particle measurements, we stress the importance of measuring particles in the ER channel. These latter allow to impose further constraints on the statistical model input parameters and to extract a more reliable picture on the presence of dynamical effects.
Proton and alpha pre-scission emission in the system 32S + 109Ag at 180 MeV / Vardaci, Emanuele; LA RANA, Giovanni; Brondi, Augusto; M., Kildir; Moro, RENATA EMILIA MARIA; D., Fabris; G., Nebbia; G., Viesti; G., Prete. - STAMPA. - (1997), pp. 655-664. (Intervento presentato al convegno Proceedings of the International Symposium on Large-Scale Collective Motion of Atomic Nuclei tenutosi a Brolo,Messina, Italia nel Ottobre 15 - 19, 1996).
Proton and alpha pre-scission emission in the system 32S + 109Ag at 180 MeV
VARDACI, EMANUELE;LA RANA, GIOVANNI;BRONDI, AUGUSTO;MORO, RENATA EMILIA MARIA;
1997
Abstract
Charged-particles in coincidence with fission fragments (FF) and evaporationresidues (ER) have been measured for the system 180-MeV 32S + 109Ag leading to the composite system 141Eu at the excitation energy Ex 90 MeV. Energy spectra and multiplicities in both channels have been compared to the predictions of the statistical model by using the code PACE2. The best overall agreement was obtained, by using af /aν=1.12, a fission delay 12 < τd < 14 ( x 10−21s) and reduced alpha barriers in the relevant J-region for the fission channel. In addition to pre-scission particle measurements, we stress the importance of measuring particles in the ER channel. These latter allow to impose further constraints on the statistical model input parameters and to extract a more reliable picture on the presence of dynamical effects.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
