We discuss experimental data concerning Ca-48+Ca-48 and Ca-42+Fe-54 reactions at 25 MeV/nucleon obtained by using the 47 multi-detector Chimera. Effects due due to the different neutron to proton ratios (N/Z) of the two systems have been investigated. Charge distributions of forwardly emitted fragments show even-odd staggering whose amplitude is larger for the neutron poor system. Moreover, the neutron excess of the total system influence the evolution of fusion-like sources formed in semi-central collisions. In particular, for the neutron rich system, the relative emission yield of heavy residues is larger, while multi-fragmentation and binary-like events prevail in the neutron poor system.

We discuss experimental data concerning Ca-48+Ca-48 and Ca-42+Fe-54 reactions at 25 MeV/nucleon obtained by using the 47 multi-detector Chimera. Effects due due to the different neutron to proton ratios (N/Z) of the two systems have been investigated. Charge distributions of forwardly emitted fragments show even-odd staggering whose amplitude is larger for the neutron poor system. Moreover, the neutron excess of the total system influence the evolution of fusion-like sources formed in semi-central collisions. In particular, for the neutron rich system, the relative emission yield of heavy residues is larger, while multi-fragmentation and binary-like events prevail in the neutron poor system.

Entrance channel effects in medium mass nuclear systems at 25 MeV/nucleon

Geraci E;PAGANO, ANGELO;POLITI, Giuseppe;RIZZO, Francesca;
2014

Abstract

We discuss experimental data concerning Ca-48+Ca-48 and Ca-42+Fe-54 reactions at 25 MeV/nucleon obtained by using the 47 multi-detector Chimera. Effects due due to the different neutron to proton ratios (N/Z) of the two systems have been investigated. Charge distributions of forwardly emitted fragments show even-odd staggering whose amplitude is larger for the neutron poor system. Moreover, the neutron excess of the total system influence the evolution of fusion-like sources formed in semi-central collisions. In particular, for the neutron rich system, the relative emission yield of heavy residues is larger, while multi-fragmentation and binary-like events prevail in the neutron poor system.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11769/38947
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