Study on Fission Decay Width of Superheavy Nuclei ²⁹⁸119 Synthesized Through the Various Fusion Reactions

The neck connecting the two developing pieces of a heavy nucleus is broken when the process of nuclear fission comes to an end, leaving the fragments only able to interact through long-range potential fields. We examine seven fusion reactions involving varied projectile-target pairings to synthesis superheavy nucleus ²⁹⁸119. The fission decay width is evaluated for fusion reactions ⁷²Zn +²²⁶Ac, ⁶⁴Cu + ²³⁴Th, ⁶⁷Cu + ²³¹Th, ⁶⁶Ni + ²³²Pa, ⁶⁰Co + ²³⁸U, ⁶⁰Fe + ²³⁸Np, and ⁵²Mn + ²⁴⁶Pu. Neutron decay width, fission decay width, and survival probability are investigated in the considered fusion reactions.

The importance of entrance channels, like mass asymmetry, charge asymmetry, mean fissility, and charge product, were studied. The fusion reaction ⁵²Mn + ²⁴⁶Pu exhibits a higher survival probability against fission near the fusion barrier. These fusion reactions have short-lived isotopes that tend to have lower , making experiments challenging. Future studies should explore alternative projectile-target combinations to enhance survival probabilities.