Structures in the excitation function ofMg24(16O,20Ne)20Ne and a nonresonant description of these structures

The excitation functions of the reactions {sup 24}Mg({sup 16}O,{sup 20}Ne){sup 20}Ne and {sup 24}Mg({sup 16}O,{sup 12}C){sup 28}Si were measured at {theta}{sub c.m.}=90{degree} and 70{degree}, 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 {alpha}-transfer channels, through the dynamic {alpha}-transfer polarization potential.