multifragmentation in central collisions in 58Ni+48Ca
at 25 AMeV, L.
Francalanza for the
CHIMERA – ISOSPIN collaboration, Dipartimento
di Fisica - INFN Catania, Italia − The experimental data
concerning the 58Ni+48Ca
a 25 AMeV reaction at Elab(Ni)=25 AMeV in C57
by usingthe CHIMERA
4π device, have
been analyzed in order to investigate the competition between
reaction mechanisms for central collisions in Fermi energy domain.
The method adopted to
select such central
collisions, by means of construction of the kinetic energy tensor
evaluation of the “flow angle” event by event is presented. Some global observables,
able to characterize the
pattern of central collisions, have been constructed, and the main
the reaction products are analyzed in terms of some observables,
like mass and
velocity distributions, and their correlations. Greater emphasis was
devoted to the
competition between fusion-evaporation processes with consequent
a heavy residue and multifragmentation of a well-defined (if any)
nuclear system formed in central collisions.Data taken in the C57 experiment.