Comparative Analysis of Decay Processes in 20 Ne + 181Ta → 201Bi Reaction

Abstract

The collision between a heavy ion projectile and a target nucleus may lead to the formation of compound nucleus (CN) as well as non-compound nucleus (NCN). Hence it can not be directly concluded that in what manner the final products of a nuclear reaction would be formed. In addition to this fact another thing worth noting is that we also can’t easily get an idea of the decay process(es) involved in a reaction i.e. whether the system which we have obtained from the reactants decays giving compound nucleus contribution or it decays giving Non-Compound Nucleus(NCN) contribution. Not only this, another case is where the decay can be from CN nucleus as well as NCN simultaneously for a single system under consideration. Measurement of fission products and evaporation residues in general provide a comprehensive picture of the process subsequent to collision between projectile and target nucleus. In order to investigate various decay mechanisms in 20Ne10+ 181Ta73 reaction forming 201Bi83 system, the ER, fission cross-section data obtained from experimental results have been studied. In order to have detailed knowledge of the changes that may occur when the deformation effects are included the given system i.e. 201Bi has been studied explicitly for the deformed and spherical cases. The theoretical study of the decay of 201Bi system through DCM model for deformed case gave the information that reported cross-section of the lighter particles is similar as that of the theoretically calculated one. But, the fission cross-section support the idea of contribution from NCN channel as the value for it could not match with reported value. Further the spherical case also revealed the similar results except for the fact that the expected contribution from NCN comes out to be more than that from the deformed case.