The excitation functions of the reactions ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$${(}^{16}$O${,}^{20}$Ne${)}^{20}$Ne and ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$${(}^{16}$O${,}^{12}$C${)}^{28}$Si were measured at ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}=90\mathrm{}}$° and 70°, respectively, in the energy interval of 25 to 34 MeV in steps of 240 keV. They display strong structures with widths of 1 to 2 MeV and are compared to calculations including the coupling to higher orders between elastic and α-transfer channels, through the dynamic α-transfer polarization potential.

• Received 3 January 1989

DOI:https://doi.org/10.1103/PhysRevC.40.681