Systematic study of 16O-induced fusions with the improved quantum molecular dynamics model

TL;DR

This study uses the improved quantum molecular dynamics model to systematically analyze fusion reactions induced by 16O on various nuclei, successfully reproducing experimental cross sections and exploring the effects of Fermi constraints.

Contribution

It introduces an application of the ImQMD model with specific parameters to systematically study 16O-induced fusion reactions and examines the role of Fermi constraints in fusion dynamics.

Findings

Fusion cross sections are well reproduced near and above Coulomb barriers.

Fermi constraints significantly influence fusion process and fragment stability.

Dynamical potentials are analyzed alongside fusion outcomes.

Abstract

The heavy-ion fusion reactions with 16O bombarding on 62Ni, 65Cu, 74Ge, 148Nd, 180Hf, 186W, 208Pb, 238U are systematically investigated with the improved quantum molecular dynamics (ImQMD) model. The fusion cross sections at energies near and above the Coulomb barriers can be reasonably well reproduced by using this semi-classical microscopic transport model with the parameter sets SkP* and IQ3a. The dynamical nucleus-nucleus potentials and the influence of Fermi constraint on the fusion process are also studied simultaneously. In addition to the mean field, the Fermi constraint also plays a key role for the reliable description of fusion process and for improving the stability of fragments in heavy-ion collisions.