Systematic of fusion suppression and its dependency on projectile breakup threshold energy

Abstract Measurement of excitation function (EF) of the observed evaporation residues (ERs) populated in the 20Ne + 93Nb reaction at E_lab ≈ 91-145 MeV were carried out to explore the systematic of fusion suppression and its dependency on projectile breakup threshold energy by employing the offline γ-ray detection method. Excitation function (EF) of the observed ERs populated through complete and/or incomplete fusion processes were analysed in the framework of statistical mode code PACE4. Fusion function, derived from experimentally measured fusion cross section, is compared with the universal fusion function (UFF) to estimate the degree of fusion incompleteness. Based on the observed results, an empirical formula is proposed here to interrelate the degree of fusion suppression and breakup threshold energy of the incident projectile.