Study of Reaction Mechanism and Dependence of Incomplete Fusion on Projectile Energy and Entrance Channel Mass-Asymmetry of 12C + 169Tm, 16O + 169Tm And 16O + 75As Systems At 4-7.5MeV/Nucleon Energy Beam

TL;DR

This paper investigates how projectile energy and entrance channel mass asymmetry influence incomplete fusion in heavy-ion reactions involving 12C and 16O with various targets, using experimental data and statistical modeling.

Contribution

It provides new insights into the dependence of incomplete fusion on projectile energy and mass asymmetry, supported by experimental data and theoretical analysis.

Findings

Incomplete fusion increases with projectile energy.

More mass-asymmetric systems exhibit higher incomplete fusion fractions.

Experimental excitation functions generally agree with theoretical predictions.

Abstract

This study focus on the correlation between entrance channel properties and incomplete fusion reaction. The dynamics of heavy-ion fusion reactions involved in the interaction of 12C and 16O with 169Tm and 75As targets were examined at 3-8MeV/nucleon specific energies. The influence of projectile energy and entrance channel mass-asymmetry on the incomplete fusion process in the interaction of 12C + 169Tm, 16O + 169Tm and 16O + 75As systems at energies ranging from 4-7.5 MeV/Nucleon was examined in this study. The PACE4 statistical model was used to compare and analyze the measured cross sections from the EXFOR data base. The values of level density parameter, which is a sensitive input parameter, were optimized using a representative non-a-emitting channel from the respective systems. The experimentally measured excitation functions for representative non {\alpha}-emitting channels were found to be in good agreement with the theoretical predictions in general. However, for {\alpha}-emitting channels in the current systems, the measured excitation functions were greater than the theoretical model code predictions, which could be attributed to incomplete fusion reaction at these energies. The observed enhancements in {\alpha}-emitting channels were attributable to the contribution coming from incomplete fusion reactions. The incomplete fusion fraction, which explains the relative relevance of incomplete fusion processes, was attempted to be approximated. The incomplete fusion fraction was shown to be sensitive to the projectile energy and mass-asymmetry of the entrance channel. Further, the results showed that incomplete fusion reactions were higher for more mass-asymmetric systems than mass-symmetric one.