Isospin influence on the intermediate-Mass Fragments production at low energy (original) (raw)

The reactions 78 Kr + 40 Ca and 86 Kr + 48 Ca realized at 10 AMeV, have been studied in Catania at LNS with the 4π multidetector CHIMERA. For these systems, we have already studied the fusion-evaporation and fission-like processes. Now we will present a study of the break-up of the Projectile-Like Fragment (PLF) into two fragments, following more violent deep-inelastic collision. A selection method has been developed, in order to discriminate PLF break-up from events due to other mechanisms, fusion-fission-like processes, which populate the same region of the phase-space. A preference for PLF aligned break-up, along the direction of the PLF-TLF separation axis with the light fragment emitted in the backward part, has been evidenced, suggesting dynamical-nonequilibrium effects. The isospin is expected to play a crucial role in the onset of this process; a comparison between the neutron-rich 86 Kr + 48 Ca system and neutron-poor 78 Kr + 40 Ca one will be presented.

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