Detailed study of multinucleon transfer features in the ¹³⁶Xe+²³⁸U reaction

Background: Multinucleon transfer (MNT) reactions are considered now as a possible tool to produce new isotopes of heavy and superheavy elements. Purpose: Experimental study of MNT fragments formed in the 136Xe + 238U reaction at 136Xe beam energy of 1.11 GeV and comparison with theoretical calculations. Methods: Primary and secondary mass and energy distributions of projectilelike fragments (PLF) formed in the 136Xe + 238U reaction have been experimentally investigated independently and in coincidence with survived heavy targetlike fragments (TLF) using the CORSET setup. Since the heavy fragments formed in the reactions 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 27.2 degrees Blab 32.8 degrees 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 reliability of performed analysis. Conclusions: The transfer of about 27 nucleons from the projectile to target nucleus has been found. The cross section of the heaviest observed fragment with the mass of 265 u is about few hundred microbarns. The survival probabilities of transtarget nuclei formed in the reaction drop rapidly from approximate to 7 x 10-1 for the fragment mass of 240 u to approximate to 1.8 x 10-3 for 255 u.