23Na+23Na fusion with unpolarized and aligned beams
Fusion cross sections for the23Na+23Na entrance channel were measured at beam energies between 80 and 177 MeV by detecting the evaporation residues from the compound nucleus46Ti. Additionally the tensor analyzing powerT20fus for fusion of aligned23Na with23Na was measured atE=170 MeV bombarding energy. The results for the fusion cross section and ofT20fus, together with results from other fusion reactions, leading to the same compound nucleus46Ti, are discussed in terms of entrance channel and compound nucleus models, which both intend to describe the observed limitation of fusion at high energies. It is shown thatT20fus represents a sensitive test for heavy-ion fusion models at these energies.