Study of fission fragments mass distribution and prompt γ-ray spectrum in ²⁸Si+²³⁸U reaction

The main objective of heavy ion induced fusion reaction is synthesis of super-heavy elements. The formation of the heavy elements depend on the penetration probabilities of the Coulomb barrier between two colliding nuclei, formation of a compound nucleus after the system is captured inside the Coulomb barrier, and survival of the exited compound nucleus against fission (fusion-fission) to produce evaporation residue (ER). In fusion- fission reaction using a heavy target and projectile, quasifission competes against fusion. The measurement of gamma ray multiplicity in coincidence with the fragment mass has been investigated in heavy ion induced reaction on preactinide targets which shows a strong mass dependency in ⁴⁰Ar+¹⁵⁴Sm, ²⁰Ne+¹⁹⁷Au systems