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We present detailed results of a theoretical investigation on the productionof evaporation residue nuclei obtained in a heavy ion reaction when chargedparticles (proton and $\alpha$-particle) are also emitted with the neutronevaporation along the deexcitation cascade of the formed compound nucleus. Thealmost mass symmetric $^{82}$Se+$^{138}$Ba reaction has been studied sincethere are many experimental results on individual evaporation residue (ER)cross sections after few light particle emissions along the cascade of the$^{220}$Th compound nucleus (CN) covering the wide 12--70 MeV excitation energyrange. Our specific theoretical results on the ER cross sections for the$^{82}$Se+$^{138}$Ba are in good agreement with the available experimentalmeasurements, but our overall theoretical results concerning all possiblerelevant contributions of evaporation residues are several times greater thanthe ERs measured in experiment. The discrepancy could be due to theexperimental difficulties in the identification of ER nuclei after the emissionof multiple neutral and charged particles, nevertheless the analysis of ER datais very important to test the reliability of the model and to stress theimportance on the investigation of ER nuclei also obtained after chargedparticle emissions.

nuclear physics a

Role of charged particle emission on the evaporation residue formation  in the $^{82}$Se+$^{138}$Ba reaction leading to the $^{220}$Th compound  nucleus