Compound and non-compound nucleus contributions in the evaporation residue cross-sections of 20Ne + 181Ta → 201Bi⁎ reaction at and 162 MeV

Abstract

Abstract The simultaneous existence of Compound Nucleus (CN) and Non-Compound Nucleus (NCN) processes in the decay of a nuclear system, provide a comprehensive picture of nuclear reaction dynamics and related phenomenon in low energy region. The CN and NCN based Evaporation Residue (ER) cross-section data is available for 20 Ne + 181 Ta → 201 Bi ⁎ reaction at two energies i.e. E lab = 150 MeV and E lab = 180 MeV , and the same is tested in the framework of Dynamical Cluster Decay Model (DCM). Experimentally, the NCN component is reported to have major contribution from Incomplete Fusion (ICF) channel and the Deep Inelastic Collision (DIC) component is shown to be negligibly small. The ER formed in CN and NCN (ICF in present case) are nicely reproduced in the framework of DCM. The available CN based ER cross-sections are fitted for spherical, β 2 deformed and β 2 – β 4 deformed fragmentation paths, which in turn provide a nice description of deformation effects in the decay of 201 Bi ⁎ formed in 20 Ne induced reaction. The role of barrier modification and angular momentum dependence is also addressed in addition to deformation and orientation effects.