Systematics on production of superheavy nuclei $$Z = 119-122$$ in fusion-evaporation reactions

The fusion dynamics of the formation superheavy nuclei were investigated thoroughly within dinuclear system model. Monte Carlo approach was implemented in nucleon transfer process to include all possible orientations, at which is assumed be formed touching configuration fragments. production cross sections Cn, Fl, Lv, Ts, and Og calculated compared with available data from Dubna. evaporation residue excitation functions channels pure neutrons charged particles systematically analyzed. combinations $$^{44}$$ Sc, $$^{48,50}$$ Ti, $$^{49,51}$$ V, $$^{52,54}$$ Cr, $$^{58,62}$$ Fe, $$^{62,64}$$ Ni bombarding actinide nuclides $$^{238}$$ U, $$^{244}$$ Pu, $$^{248}$$ Cm, $$^{247,249}$$ Bk, $$^{249,251}$$ Cf, $$^{252}$$ Es, $$^{243}$$ Am produce elements $$Z=119-122$$ . We obtained that sensitively depend on neutron richness reaction system. structure function related separation energy fission barrier compound nucleus.