Complete Fusion of Weakly Bound Cluster-Type Nuclei at Near Barrier Energies

TL;DR

This paper investigates how breakup channels affect the complete fusion of weakly bound cluster nuclei near the Coulomb barrier, highlighting the role of transfer processes and dynamic polarization potentials supported by CDCC calculations.

Contribution

It introduces a dynamic polarization potential framework to analyze fusion cross sections, emphasizing the significance of transfer-induced breakup over direct breakup in weakly bound systems.

Findings

Sub-barrier fusion cross section enhancement explained by transfer channels.

Dynamic polarization potentials effectively model experimental fusion data.

Sequential breakup processes like neutron stripping influence fusion outcomes.

Abstract

We consider the influence of breakup channels on the complete fusion of weakly bound cluster-type systems in terms of dynamic polarization potentials. It is argued that the enhancement of the cross section at sub-barrier energies may be consistent with recent experimental observations that nucleon transfer, often leading to breakup, is dominant compared to direct breakup. The main trends of the experimental complete fusion cross sections are analyzed in the framework of the Dynamic Polarization Potential approach. The qualitative conclusions are supported by CDCC calculations including a sequential breakup channel, the one neutron stripping of $^7$Li followed by the breakup of $^6$Li.