Examination of cluster production in excited light systems at Fermi energies from new experimental data and comparison with transport model calculations

Abstract

Four different reactions, $^{32}$S+$^{12}$C and $^{20}$Ne+$^{12}$C at 25 and\n50 MeV/nucleon, have been measured with the FAZIA detector capable of full\nisotopic identification of most forward emitted reaction products. Fragment\nmultiplicities, angular distributions and energy spectra have been measured and\ncompared with Monte Carlo simulations, i.e. the antisymmetrized molecular\ndynamics (AMD) and the heavy-ion phase space exploration (HIPSE) models. These\nmodels are combined with two different afterburner codes (HF$l$ and SIMON) to\ndescribe the decay of the excited primary fragments. In the case of AMD, the\neffect of including the clustering and inter-clustering processes to form bound\nparticles and fragments is discussed. A clear confirmation of the role of\ncluster aggregation in the reaction dynamics and particle production for these\nlight systems, for which the importance of the clustering process increases\nwith bombarding energy, is obtained.\n