Systematic study of complete fusion suppression in reactions involving weakly bound nuclei at energies above the Coulomb barrier

TL;DR

This study investigates how breakup effects suppress complete fusion in reactions with weakly bound nuclei at energies above the Coulomb barrier, using an empirical model fitted to experimental data.

Contribution

It introduces an empirical coupled-channel model with an exponential breakup probability function to quantify fusion suppression effects.

Findings

Fusion suppression is roughly target-independent for the same projectile.

The model accurately fits measured breakup probabilities and fusion cross sections.

Breakup effects significantly reduce complete fusion cross sections at above-barrier energies.

Abstract

Complete fusion excitation functions of reactions involving breakup are studied by using the empirical coupled-channel (ECC) model with breakup effects considered. An exponential function with two parameters is adopted to describe the prompt-breakup probability in the ECC model. These two parameters are fixed by fitting the measured prompt-breakup probability or the complete fusion cross sections. The suppression of complete fusion at energies above the Coulomb barrier is studied by comparing the data with the predictions from the ECC model without the breakup channel considered. The results show that the suppression of complete fusion are roughly independent of the target for the reactions involving the same projectile.