16O-induced transfer reactions on 90Zr

Cross-section for transfer reactions 90Zr(16O,X) have been measured at an incident energy of 90 MeV. The angular distribution of the elastic scattering 90Zr(16O,16O)90Zr, the inelastic scattering to excited states of 90Zr, the one-nucleon transfer reactions 90Zr(16O,15N)91Nb (g.s., 0.104 and 3.37 MeV states), 90Zr(16O,15O)91Zr (g.s. and 2.17 MeV state) 90Zr(16O,17O)91Zr (g.s.) and the two-nucleon transfer reactions 90Zr(16O,14C)92Mo (ground and 1st excited states) are analyzed in the coupled-reaction-channel (CRC) formalism. Starting with a double-folded real potential, the elastic-scattering angular distribution is calculated using the CRC code FRESCO. The absorptive potential is then generated through the coupling of various inelastic and transfer processes that occur at the nuclear surface. Addition of a short-range imaginary potential in the coupling scheme, whose purpose was to take into account the effect due to loss of flux in fusion channel, reproduces the measured elastic-scattering angular distribution. A good description of all the quasi-elastic data has been achieved and the absolute magnitudes are reproduced without any arbitrary normalization. The relative importance of the one-step cluster transfer of two protons vs. the two-step successive transfer has been studied. (orig.)