Coupled-channel analysis of elastic and inelastic alpha scattering on 24Mg in the energy range 28--120 MeV

The elastic and inelastic α scattering to states of the groundstate and γ band in 24Mg has been measured at 54 MeV. The data have been analyzed with the coupled-channel method based both on conventional Saxon-Woods type potentials and double-folding potentials. Coupled-channel calculations utilizing the results of this analysis give a good overall agreement with existing data in the energy range 28--120 MeV. The deduced isoscalar transition strengths compare very favorably with corresponding electromagnetic properties as well as with phenomenological interacting boson-model and microscopic shell-model calculations. The only serious discrepancy between isoscalar and electromagnetic properties, the 22+ yields 21+ transition strength, persists further on. The shell-model calculations have been carried out based upon the Wildenthal interaction. They account very well for both the energies and the dynamic properties of the ground state and γ band of 24Mg