Microscopic study of heavy-particle transfer reactions: the (16O,α) reactions on 16O and 28Si

The transfer reactions 28Si(16O, α)40Ca and 16O(16O, α)28Si have been studied within the framework of the two-channel generator coordinate method. The geometry of the reactions has been discussed in terms of the cross-channel overlap kernels of the generating functions. A clear connection between maxima in the reaction rate and entrance channel resonances has been established. A two-step reaction mechanism involving quasimolecular resonances of inelastic 16O(16O) channels is discussed as a possible explanation for narrow structures seen in the 16O(16O, α)28Si reaction cross section. (orig.)