Multinucleon-transfer fragments formed in the reaction
Phys. Rev. C 112, 014625 – Published 28 July, 2025
DOI: https://doi.org/10.1103/tgv9-d1vf
Abstract
Background: Multinucleon transfer (MNT) reactions are now considered as a possible tool to produce new isotopes of heavy and superheavy elements.
Purpose: Experimental study of MNT fragments formed in the reaction at beam energy of 1.85 GeV and comparison with the previous measurements of the system [E. M. Kozulin et al., Phys. Rev. C 109, 034616 (2024)].
Methods: Primary and secondary mass and energy distributions of projectile-like fragments (PLF) formed in the reaction have been experimentally investigated independently and in coincidence with survived heavy target-like fragments (TLFs) using the CORSET setup. Since the heavy fragments formed in the reaction are highly excited, the masses, energies, and angles of both fragments as products of the sequential fission of heavy MNT fragments have been measured.
Results: The cross sections for PLFs at along with survived TLFs and TLFs undergoing fission have been obtained. The mass loss during the deexcitation process of excited PLFs has been found using the measured primary and secondary masses. The excitation energies of light and heavy MNT fragments have been estimated from the mass loss and total kinetic energies. An overall good agreement with theoretical calculations increases the reliability of the analysis.
Conclusions: The transfer of about 46 nucleons from the projectile to the target nucleus has been found. The cross section of the heaviest observed fragment with the mass of 284 u is about hundred microbarns. The heaviest survived fragments with mass 258 u and cross section of about 10 microbarns correspond to the formation of heavy actinide nuclei up to mendelevium.
