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 50 MeV/nucleon, have been measured with the FAZIA detector capable of full isotopic identification of most forward emitted reaction products. Fragment multiplicities, angular distributions and energy spectra have been measured and compared with Monte Carlo simulations, i.e. the antisymmetrized molecular dynamics (AMD) and the heavy-ion phase space exploration (HIPSE) models. These models are combined with two different afterburner codes (HF$l$ and SIMON) to describe the decay of the excited primary fragments. In the case of AMD, the effect of including the clustering and inter-clustering processes to form bound particles and fragments is discussed. A clear confirmation of the role of cluster aggregation in the reaction dynamics and particle production for these light systems, for which the importance of the clustering process increases with bombarding energy, is obtained.

15 pages, 14 PDF figures

References in corpus (11)

• Systematics of central heavy ion collisions in the 1A GeV regime
• Dynamics of clusters and fragments in heavy-ion collisions
• In-medium effects for nuclear matter in the Fermi energy domain
• Cluster-liquid transition in finite saturated fermionic systems
• Transport Model Simulations of Projectile Fragmentation Reactions at 140 MeV/nucleon
• Isospin diffusion measurement from the direct detection of a Quasi-Projectile remnant
• Dynamical fission of the quasiprojectile and isospin equilibration for the system 80Kr+ 48 Ca at 35 MeV/nucleon
• Non-statistical decay and $\alpha$-correlations in the ${}^{12}$C+${}^{12}$C fusion-evaporation reaction at 95 MeV
• Thermal properties of light nuclei from ${}^{12}$C+${}^{12}$C fusion-evaporation reactions
• Comparison of AMD calculations with experimental data for peripheral collisions of 93Nb+93Nb,116Sn at 38 MeV/nucleon
• Influence of fast emissions and statistical de-excitation on the isospin transport ratio

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• Isospin diffusion from ${}^{40,48}$Ca${+}^{40,48}$Ca experimental data at Fermi energies: Direct comparisons with transport model calculations
• Study of quasi-projectile properties at Fermi energies in 48Ca projectile systems