Pair transfer and the sub-barrier fusion ofO18+58

Abstract

Evaporation residue cross sections for the "0+"Ni and ' 0+ Ni fusion reactions have been measured in the energy range from 3 below to 20 MeV above the Coulomb barrier. The low-energy fusion enhancements found in the two systems are very different. A comparative analysis suggests that collective pair transfer modes play an important role in the sub-barrier fusion of ' 0+' Ni.PACS number(s): 25.70.Jj

Cross sections for the production of superheavy nuclei

“…A typical trajectory of the nuclear system in collision of 48 19. This trajectory leads the system to the QF channel.…”

“…The dashed curve shows the calculations with coupling to surface vibrations but without neutron transfer, whereas the solid curve was obtained within the ECC model accounting for neutron rearrangement in the entrance channel. (Right panel) Fusion excitation functions for18 O + 58 Ni (open circles) and16 O + 60 Ni (filled circles)[19]. Other notations are the same as in the left panel.…”

Effect of Two-neutron Transfer with PositiveQ-value on Sub-barrier Fusion

“…For the 18 O+ 58 Ni system, fusion enhancement undoubtedly exits although the cross sections were measured near the barrier [34,35], compared to its reference, the 16 O+ 60 Ni system. Later the BD extracted from the backward quasi-elastic scattering [39] also supports this point.…”

Nonlocal effects in the nucleus-nucleus fusion cross section

“…Therefore, it is clear &om our model that these nonlocal effects are important for energies below or around the top of the barrier, and it is based on these results that we can argue about the importance of the nonlocality as, at least in part, a possible answer to the well-known problem of the discrepancies in the subbarrier fusion cross section. Table I [19,20]. It is worth notic-…”