Effect of alpha-Q-value on reaction dynamics at ≈ 4-7 AMeV

Abstract

This paper deals with the dependence of incomplete fusion reaction dynamics on various entrance channel parameters, specially, the alpha-Q-value effect. The excitation functions for several radio-nuclides formed in 13 C+159 Tb interactions at ≈ 4-7 AMeV have been measured using activation technique followed by γ-spectroscopy. The experimentally measured excitation functions have been analyzed in the framework of statistical model code PACE4. A sizeable contribution of incomplete fusion has been delineated in the production of α-emitting channels in reference to the Monte Carlo simulation based statistical model code PACE4. For better insights into the onset and strength of incomplete fusion, the incomplete fusion strength function has been deduced as a function of various entrance channel parameters. A significant amount of incomplete fusion contribution has been observed at slightly above barrier energies, and found to increase smoothly with incident projectile energy. Present results have also been compared with the results obtained in the interactions of 16 O and 12 C with same target 159 Tb, to probe the dependence of incomplete fusion on projectile, specially, on the binding energy & alpha-Q-value. The present work in light of previous data hints that instead of binding energy, the alpha-Q-value of the projectile is a parameter which influences the in-complete fusion reaction dynamics.