Influence of entrance channel on production cross section of exotic actinides in multinucleon transfer reactions

TL;DR

This study uses the dinuclear system model to analyze how entrance channel properties like mass asymmetry and isospin influence the production of exotic actinides in multinucleon transfer reactions, providing predictions for future experiments.

Contribution

It systematically investigates the effects of mass asymmetry and isospin on exotic actinide production, offering new insights and predictions for optimal reaction conditions.

Findings

Heavier projectiles produce wider isotopic distributions.

Reactions with heavier targets favor exotic actinide production.

Massive new actinides predicted at nanobarn to millibarn levels.

Abstract

Within the framework of the dinuclear system model, the influence of mass asymmetry and the isospin effect on the production of exotic actinides have been investigated systematically. The isotopic yields populate in multinucleon transfer reactions of Ca(48), Kr(86), Xe(136), and U(238) bombarding on Cm(248) are analyzed and compared to the available experimental data. Systematics on the production of unknown actinides from Ac to Lr via the available stable elements on the earth (from Ar to U) as projectiles-induced reactions with $^{232}$Th, $^{238}$U and $^{248}$Cm are investigated thoroughly. Potential energy surface and total kinetic energy distribution for the reaction system are calculated and can be used to predict the production cross-section trends. It is found that the heavier projectile leads to the wider isotopic chain distribution for the same target. The heavier target-based reactions prefer to produce plenty of exotic actinides through both mechanisms of deep-inelastic and quasi-fission reactions. Isospin relaxation plays a crucial role in the colliding process, resulting in actinide isotopic distribution tends to shift to the drip lines. Massive new actinides have been predicted at the level of nanobarn to millibarn. The optimal projectile-target combinations and beam energies were proposed for the forthcoming experiments.