Multifragmentation of reconstructed quasi-projectiles in the mass region A ∼ 30
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The production of fragments from a broad range of reconstructed quasi-projectiles obtained in the interaction of 32S (45 MeV/nucleon) with 112Sn was studied. A good description of the experimental data on the multifragmentation of these light quasi-projectiles with a model framework based on deep inelastic transfer followed by SMM (statistical multifragmentation model) was obtained. The charge and mass distributions of the observed fragments show that the break-up of a given quasi-projectile source is highly correlated to its isospin composition. The sensitivity of the hot primary fragments to the symmetry energy was investigated in detail. It was found that for the present light systems (A30), a good description of the experimental data on the charge distributions, the N/Z distributions and the isotopic distributions of the fragments is obtained by the SMM calculations involving the standard (Csym = 25 MeV), as well as, a reduced value of the symmetry energy (Csym = 8 MeV). However, the reduced value of the symmetry energy appears to provide a better description of the isotopic distributions in most of the cases. This is in agreement with an overall reduction of the symmetry energy of primary fragments indicated by a number of multifragmentation studies of heavier systems. © 2012 IOP Publishing Ltd.
author list (cited authors)
Soisson, S. N., Botvina, A., Souliotis, G. A., Stein, B. C., Heilborn, L., Keksis, A. L., ... Yennello, S. J.