Influence of the neutron numbers of projectile and target on the evaporation residue cross sections in hot fusion reactions

Within the framework of a dinuclear system model, the influence of projectile and target neutron number on capture cross section, fusion probability, and survival probability for the reactions ^S,36_{<mml:mprescripts></mml:mprescripts>34}+^{<mml:mprescripts></mml:mprescripts>238}U and ^{<mml:mprescripts></mml:mprescripts>48}Ca+<mml:mmultiscripts>Pu <mml:mprescripts></mml:mprescripts>239 ,240 ,242 ,244 </mml:mmultiscripts> are investigated. The calculated excitation functions are in good agreement with the experimental data. To synthesize more unknown neutron-deficient isotopes of already-known superheavy elements, the possibility of using lighter calcium isotopes to induce hot fusion reactions is investigated and the maximal evaporation residual cross sections for <mml:mmultiscripts>Ca <mml:mprescripts></mml:mprescripts>44 ,46 ,48 </mml:mmultiscripts>-induced hot fusion reactions to produce unknown neutron-deficient superheavy nuclei with Z =112 -116 are predicted.