Correlation of intrinsic fusion barriers and evaporation residue cross-sections of SHEs.

A correlation between the variation of the intrinsic fusion barrier with incident energy and the measured excitation function of fusion-evaporation residue cross-section has been obtained for the reactions: 48 Ca + 238 U → 112 286 Cn ∗ , 48 Ca + 242 Pu → 114 290 Fl ∗ , and 48 Ca + 243 Am → 115 291 Mc ∗ . The maximum value of the measured fusion-evaporation residue cross-section corresponds to the incident energy which is either equal to or within ± 5 MeV of the incident energy for which the intrinsic fusion barrier is minimum. The optimum energy estimates obtained for undiscovered superheavy elements formed in reactions ⁵¹ V + ²⁴⁸Cm → ²⁹⁹119^* and ⁵⁰Ti + ²⁴⁹Cf → ²⁹⁹120^* are 233.20 MeV and 224.82 MeV, respectively. These estimates agree with the one available in the literature, e.g., the optimum energies for ²⁹⁹119^* are 234.8 ± 1.8 MeV and 237 MeV, and for ²⁹⁹120^* is 225 MeV. [ABSTRACT FROM AUTHOR]