Detailed study of multinucleon transfer features in the Xe 136 + U 238 reaction
Kozulin E.M. Knyazheva G.N. Karpov A.V. Saiko V.V. Bogachev A.A. Itkis I.M. Novikov K.V. Vorobiev I.V. Pchelintsev I.V. Savelieva E.O. Tikhomirov R.S. Itkis M.G. Oganessian Y.T.
March 2024American Physical Society
Physical Review C
2024#109Issue 3
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 Xe136+U238 reaction at Xe136 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 Xe136+U238 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°≤θlab≤32.8° 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 ≈7×10-1 for the fragment mass of 240 u to ≈1.8×10-3 for 255 u.
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Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
Dubna State University, Dubna, 141980, Russian Federation
Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
Flerov Laboratory of Nuclear Reactions
Dubna State University
Institute of Nuclear Physics
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