Measurement of cross-sections in some reactions in 16O + 181Ta system at energies ∼5 MeV/nucleon

An experiment has been carried out to explore heavy ion in-complete fusion reaction dynamics within the framework of break-up fusion model at energies near and above the Coulomb barrier. Excitation functions for several radio-nuclides produced via xn, pxn and αxn-channels have been measured in 16O + 181Ta system at energies ∼ 76-100 MeV. The experimental excitation functions have been compared with those calculated using theoretical model code PACE4. It has been observed that, excitation functions of xn/pxn-channels are in good agreement with theoretical predictions. However, a significant enhancement in the measured excitation functions of α-emitting channels have been observed, which may be attributed to the in-complete fusion processes. The in-complete fusion fraction (FICF) which gives the relative importance of complete and in-complete fusion processes has been found to increase with energy. (author)