Intermediate Mass Fragments production at low energy: reaction mechanism and isospin influence

¹ INFN, Sezione di Catania -Catania, Italy
² Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania -Catania, Italy
³ INFN, Laboratori Nazionali del Sud– Catania, Italy
⁴ Heavy Ion Laboratory, University of Warsaw, Warsaw, Poland
⁵ Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università, Messina - Messina, Italy

^* e-mail: sara.pirrone@ct.infn.it

Published online: 4 December 2019

Abstract

In this work, we present a recent study concerning the break-up of the Projectile-Like (PLF) into two fragments, following more violent deep-inelastic collisions in the reactions ⁷⁸Kr + ⁴⁰Ca and ⁸⁶Kr + ⁴⁸Ca at 10 A MeV, realized at INFN-Laboratori Nazionali del Sud by using the 4π multi detector CHIMERA. For these systems, we have already analyzed the fusion-evaporation and fission-like processes. A selection method has been developed, in order to discriminate PLF break up events from those due to other mechanisms 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 put in light, suggesting the presence of dynamical effects. Also a comparison between the neutron-rich ⁸⁶Kr + ⁴⁸Ca and neutron-poor ⁷⁸Kr + ⁴⁰Ca systems is presented, to put in evidence the isospin role in these processes.