Microscopic study of the α-16O interaction on the basis of the complex effective interaction and the totally antisymmetrized many-body theory

The complex internucleus potential for α-16O system is investigated with the microscopic complex effective interaction and the totally antisymmetrized many-body theory. Both real and imaginary parts of the theoretical potential, in which the differences between the oscillator-width parameters of the target and the projectile are taken into account, coincide well with the phenomenological optical potential which is uniquely determined by the experimental results. As for the incident-energy dependence of the real part of internucleus potential, it is found that 70% is caused by the effect of antisymmetrization and that the rest is explained by the energy dependence of the effective interaction. For the imaginary part both the effect of antisymmetrization and the energy dependence of the effective interaction almost equally contribute to the incident-energy dependence