Production of neutron-rich actinide nuclides in isobaric collisions via multinucleon transfer reactions

TL;DR

This study systematically investigates multinucleon transfer reactions involving various isobaric projectiles on thorium and curium targets, revealing how shell, Coulomb, and isospin effects influence actinide production and predicting new isotopes near nuclear drip lines.

Contribution

The paper provides a comprehensive theoretical analysis of multinucleon transfer reactions with multiple isobaric projectiles, highlighting the effects of shell structure and isospin on actinide synthesis, and predicts new isotopes near the nuclear drip lines.

Findings

Production cross-sections depend strongly on projectile N/Z ratio.

Larger charge projectiles favor proton-rich isotopes.

Shell and Coulomb effects significantly influence fragment distributions.

Abstract

We have calculated the multinucleon transfer reactions of $^{208}$Os, $^{208}$Pt, $^{208}$Hg, $^{208}$Pb,$^{208}$Po, $^{208}$Rn, $^{208}$Ra,$^{132,136}$Xe bombarding on $^{232}$Th and $^{248}$Cm at Coulomb barrier energies within the dinuclear system model, systematically. The results are in good agreement with the available experimental data. Coulomb effect and shell effect on production of actinides in these reactions have been investigated thoroughly. Potential energy surface and total kinetic energy mass distributions in the reactions $^{208}$Hg, $^{208}$Pb and$^{208}$Po colliding on $^{248}$Cm and $^{232}$Th are calculated and analyzed, respectively. It is found that PES and TKE spectra manifest the fragment formation mechanism in the multinucleon transfer reactions. The isospin effect and shell effect are shown in PES and TKE. Production cross-sections of multinucleon transfer products are highly dependent on the isobar projectiles with mass number $A=208$. The isobar projectiles with larger N/Z ratios are favorable for creating the neutron-rich target-like fragments. The isobar projectiles with larger charge number induced products tend to shift to proton-rich region. Coulomb potential coupled to shell effect is shown in production cross-sections of actinide isotopes. Based on the radioactive projectiles induced reactions, we have predicted massive new actinide isotopes around nuclear drip lines, even could access the superheavy nuclei region.