Systematic Study of Incomplete Fusion Dynamics with Various Entrance Channel Parameters

Abstract

The present work aims to differentiate the contributions of complete fusion (CF) and incomplete fusion (ICF) components by the measurement and analysis of the forward recoil range distribution of ²⁰Ne projectile with ¹⁵⁹Tb target nucleus. The recoil catcher technique has been employed for the identification of residues populated in the collision of ²⁰Ne-ion beam at projectile energy ~8.2 MeV per nucleon. The result obtained from the study suggests that the complete fusion reaction occurs with complete momentum transfer, which leads to large recoil ranges of the reaction products. However, the presence of incomplete fusion, resulting from the break-up of ²⁰Ne into ¹⁶O + ⁴He, ¹²C+ ⁸Be, and/or ⁸Be + ¹²C, involves partial momentum transfer, leading to small recoil ranges where one of the fragments undergoes fusion with the ¹⁵⁹Tb target nucleus. Moreover, upon analyzing the data, the ICF fraction (F_ICF) has been estimated and compared with literature data as a function of various entrance channel parameters, namely Mass-asymmetry (µ_MA), Coulomb factor (Z_PZ_T), Deformation parameter (b₂) and Z_PZ_T´b₂. The outcomes offer valuable insights into the entrance channel parameters that influence incomplete fusion dynamics. Additionally, a new entrance channel parameter called Zeta (ζ) was introduced to investigate the combined effect of µ_MA and Z_PZ_T.