Decay Dynamics of ²²¹Ac* Nucleus Formed in ¹⁶O- and ¹²C-Induced Reactions at Above Barrier Energies

Abstract

Dynamical cluster decay model (DCM) is employed to investigate the relative emergence of evaporation residue (ER) and fusion-fission (ff) mechanisms of ²²¹Ac* compound nucleus formed in ¹⁶O + ²⁰⁵Tl and ¹²C + ²⁰⁹Bi reactions. The role of mass asymmetry and deformations is analyzed by studying the structure of fragmentation potential and distribution of preformation probability (P₀). The ER and ff cross-sections are calculated at energies $E_{{{\text{CN}}}}^{*}$ = 33–38 MeV for both the reactions and compared with the experimental data, and some predictions are made where experimental data is not available. Beside this, the reaction dynamics is analyzed using different choices of attractive nuclear potentials (Yukawa plus exponential and proximity potential). Finally, the behavior of fission fragment mass distribution is explored, and the most preferred fission fragments are identified.