Possibilities for the synthesis of superheavy element \(Z=121\) in fusion reactions

Based on the dinuclear system model, the calculated evaporation residue cross sections matched well with the current experimental results. The synthesis of superheavy elements \(Z=121\) $Z=121$ was systematically studied through combinations of stable projectiles with \(Z = 21\) $Z=21$ –30 and targets with half-lives exceeding 50 d. The influence of mass asymmetry and isotopic dependence on the projectile and target nuclei was investigated in detail. The reactions \(^{254}\) ${}^{254}$ Es ( \(^{46}\) ${}^{46}$ Ti, 3n) \(^{297}121\) ${}^{297}121$ and \(^{252}\) ${}^{252}$ Es ( \(^{46}\) ${}^{46}$ Ti, 3n) \(^{295}121\) ${}^{295}121$ were found to be experimentally feasible for synthesizing superheavy element \(Z = 121\) $Z=121$ , with maximal evaporation residue cross sections of 6.619 and 4.123 fb at 219.9 and 223.9 MeV, respectively.