Open problems in formation and decay of composite systems in heavy ion reactions

摘要

New highly exclusive experiments in the ???eld of formation and decay of composite systems in heavy ion reactions are presented. Dynamical effects are reviewed in the light of recent works on the role of the e?‘?/e?‘? asymmetry between projectile and target. The possibility of extracting directly from the experimental data the emission barrier of alpha particles emitted from highly excited nuclei is discussed. Finally, the ???rst experimental evidence of double giant resonance excitation in fusion-evaporation reaction is presented.