Measurement of quasielastic and transfer excitation functions in O-16, F-19+Th-232 reactions - art. no. 034612

Quasielastic (QE) and transfer excitation function measurements have been c arried out for the O-16, F-19 + Th-232 systems at theta(lab) = 170 degrees over a wide energy range above and below the Coulomb barrier. The data were analyzed to obtain the representation of fusion barrier distributions as w ell as the mean square compound nuclear spin values ([l(2)]), which are fou nd to compare well with the results of the standard fusion model (CCDEF) ca lculations. Further, the back-angle transfer cross-section data as a functi on of the bombarding energy were transformed to give the transfer probabili ties as a function of the distance of closest approach for 1p, 2p, 1 alpha, and 1p1 alpha transfer channels. The experimental "slope parameters" deriv ed from these data were compared with the predictions of the semiclassical model calculations. It is found that the results for single nucleon or sing le cluster transfers are well explained by the semiclassical model, whereas for multinucleon or cluster transfers, the calculations underpredict the t ransfer probabilities.