Production of neutron-rich isotopes around N=126 in multinucleon transfer reactions

TL;DR

This paper models multinucleon transfer reactions to understand the production of neutron-rich isotopes around N=126, revealing energy dependencies in the yields of different nuclei types.

Contribution

It introduces a dinuclear system model with barrier distribution approach to simulate multinucleon transfer reactions, incorporating dynamical effects and orientation contributions.

Findings

Heavy neutron-rich nuclei production weakly depends on incident energy.

Proton-rich nuclei yields increase with incident energy.

Model successfully reproduces experimental fragment production data.

Abstract

The multinucleon transfer reactions has been investigated within the dinuclear system model. The nucleon transfer is coupled to the dissipation of relative motion energy and angular momentum by solving a set of microscopically derived master equations. A barrier distribution approach is implemented in the model in order to including the contributions of different orientations and dynamical effects. The available data of fragment production via multinucleon transfer reactions could be understood with the model for the reactions of $^{136}$Xe + $^{198}$Pt/$^{208}$Pb near Coulomb barrier energies. It is found that the production of heavy neutron-rich nuclei weakly depends on the incident energy. However, the yields of proton-rich nuclei increase with the incident energy.