Fission fragment angular distribution for ²⁸Si + ¹⁷⁵Lu

Study of non-compound nuclear fission (NCNF) processes is important as complete fusion between two massive nuclei is hindered by their presence. In NCNF, the di-nuclear system, formed after capture, reseparates before it is fully equilibriated in all degrees of freedom. In a recent work, Banerjee et al. reported approximate boundaries for the on-set of NCNF processes. Presence of NCNF in a system causes the fusion probability, (P_CN), to deviate from unity. (P_CN) < 1 also signifies transition from the domain of statistical models to dynamical models. This transition occurs in the pre-actinide mass region. Significant deviation of the experimental fission fragment (FF) angular anisotropy from the prediction of the statistical saddle point model (SSPM) indicates presence of NCNF in a system. Evidences of NCNF or the signatures of fusion hindrance in reactions, leading to a pre-actinide composite system, were found experimentally through different probes (e.g. suppression in the evaporation residue (ER) cross section, anomalous FF angular anisotropy and increase in FF mass ratio distribution width. The systematics of Ref. suggests that the system under investigation, namely, ²⁸Si+¹⁷⁵Lu might show signatures of NCNF. The motive of this work is to verify the presence of NCNF in this reaction, if any, by measuring FF angular distribution above the Coulomb barrier