Fusion reactions in the $^9$Be + $^{197}$Au system above the Coulomb barrier

TL;DR

This study measures complete and incomplete fusion cross sections for the $^9$Be + $^{197}$Au system above the Coulomb barrier, revealing a 40% suppression of complete fusion and comparing results with theoretical models.

Contribution

It provides the first measurements of fusion cross sections for this system and compares experimental data with coupled channel calculations without breakup coupling.

Findings

Complete fusion suppressed by about 40% above the barrier

Increased ICF/TF ratio compared to similar systems

Total fusion cross sections align with theoretical calculations

Abstract

The cross sections of complete fusion and incomplete fusion for the $ ^{9} $Be + $ ^{197} $Au system, at energies not too much above the Coulomb barrier, were measured for the first time. The online activation followed by offline $\gamma$-ray spectroscopy method was used for the derivation of the cross sections. A slightly higher value of ICF/TF ratio has been observed, compared to other systems reported in the literature with $ ^{9} $Be beam. The experimental data were compared with coupled channel calculations without taking into account the coupling of the breakup channel, and experimental data of other reaction systems with weakly bound projectiles. A complete fusion suppression of about 40\% was found for the $ ^{9} $Be + $ ^{197} $Au system, at energies above the barrier, whereas the total fusion cross sections are in agreement with the calculations.