Effect of cluster transfer on neutron-rich nuclide production around N=126 in multinucleon transfer reactions

TL;DR

This paper models multinucleon transfer reactions near Coulomb barrier energies, incorporating cluster transfer effects, to predict production of neutron-rich isotopes around N=126, with results aligning with experimental data and proposing new isotope predictions.

Contribution

It introduces a master equation approach including cluster transfer in the dinuclear system model, enhancing predictions of neutron-rich isotope production in multinucleon transfer reactions.

Findings

Cluster transfer favors fragment formation with broader mass distribution.

Model predictions agree with Argonne experimental data.

New neutron-rich isotopes of W and Os are predicted with measurable cross sections.

Abstract

The cluster transfer in multinucleon transfer reactions near Coulomb barrier energies is implemented into the master equations in dinuclear system model, in which the deuteron, triton, $^{3}$He and $\alpha$ are taken into account. The effects of cluster transfer and dynamical deformation on the formation of primary and secondary fragments are systematically investigated. It is found that the inclusion of cluster transfer is favorable the fragment formation with increasing the transferring nucleons and leads to a broad mass distribution. The isotopic cross sections of elements W, Os, Rn and Fr in the reaction of $^{136}$Xe+$^{208}$Pb at the incident energy of E$_{c.m.}$ = 450 MeV are nicely consistent with the Argonne data. The new neutron-rich isotopes of wolfram and osmium are predicted with cross sections above 10 nb. The production mechanism of neutron-rich heavy nuclei around N = 126 in the reactions of $^{58,64,72}$Ni + $^{198}$Pt is investigated thoroughly. The cross sections for producing the neutron-rich isotopes of platinum, iridium, osmium and rhenium in the multinucleon transfer reactions of $^{64}$Ni + $^{198}$Pt and $^{72}$Ni + $^{198}$Pt at the center of mass energies of 220 MeV and 230 MeV are estimated and proposed for the future experiments.