Exact treatment of the Coulomb exchange interaction in heavy-ion collisions and its effect on elasticO16-O16andα-O18scattering

A method is proposed for the exact microscopic computation of the Coulomb exchange interaction in both elastic and inelastic heavy-ion scattering. For comparison with customary Coulomb approximations the method is applied to the elastic scattering of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ on ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ and $\alpha$ on ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$. It turns out that bound state and resonance energies are lowered noticeably and resonance widths become correspondingly smaller.