Excitation functions of fusion reactions and neutron transfer in the interaction of 6He with 197Au and 206Pb

摘要: Excitation functions for evaporation residues in the reactions 197Au(6He, xn)203-xnTl, x = 2-7, and 206Pb(6He, 2n)210Po, as well neutron transfer production of 196Au 198Au interaction 6He with 197Au were measured. The beam was obtained from accelerator complex radioactive beams DRIBs (JINR). maximum energy about 10AMeV intensity reached 2×107pps. stacked-foil activation technique used directly extracted cyclotron or focal plane magnetic spectrometer MSP-144. identification reaction products done by their γ- α-decay. fusion two neutrons characterized an increase cross-section compared to statistical model calculations. analysis data framework decay excited nuclei, which took into account sequential has shown good agreement between experimental calculated values cross-sections case sub-Coulomb-barrier 206Pb + reaction. An unusually large observed below Coulomb barrier 197Au. Possible mechanisms formation are discussed.