Abstract:
In the present work, channel-by-channel excitation functions of different evaporation residues populated
via complete and/or incomplete fusion in 12C + 169Tm system have been measured for an energy range
Elab ≈ 53–90 MeV, using recoil-catcher activation technique followed by off-line γ -spectroscopy. Experimentally measured excitation functions have been analysed in the framework ofstatistical model code PACE.
To probe the effect of entrance-channel parameters on the onset and strength of incomplete fusion, relative
contributions of complete and incomplete fusion have been deduced from the analysis of experimentally
measured excitation functions. The percentage fraction of incomplete fusion deduced from the analysis of
excitation functions has been studied in terms of incident energy, entrance-channel mass-asymmetry, ground
state alpha-Q-value, neutron skin thickness of target nuclei, and nuclear potential parameters. It has been
found that incomplete fusion start competing with complete fusion even at slightly above barrier energies
where complete fusion is assumed to the sole contributor. The probability of incomplete fusion increases
with incident energy, entrance channel mass-asymmetry, large negative ground state alpha-Q-value, neutron
skin thickness, and nuclear potential parameters for individual projectiles.
