Measurements of evaporation residue cross-sections for 48Ti+140,142Ce reactions

Evaporation residue (ER) cross-sections have been measured for the Ti-48 + Ce-140,Ce-142 reactions to understand the influence of neutron shell closure on compound nucleus (CN) formation. The measured ER cross-sections for Ti-48 + Ce-140 (N-T= 82) system are found to be very close to those of Ti-48 + Ce-142 (N-T= 84) near the Coulomb barrier. The results show that the effect of shell closure in the target nucleus on fusion cross-sections is negligible for the present systems which can be attributed to the small values of the shell correction energies in the entrance channel. Statistical model calculations are performed to interpret the experimental results. Further, comparison of the present results with those from a reaction with higher mass asymmetry in the entrance channel shows no evidence of quasifission in the present systems. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

The influence of neutron shell closure on compound nucleus formation was investigated. The experimental results showed that the effect of shell closure in the target nucleus on fusion cross-sections can be neglected in the studied system. Statistical model calculations and comparison with reactions with higher mass asymmetry did not provide evidence of quasifission in the present systems.