A refractive phase relation in light-composite-particle-nucleus elastic and inelastic scattering at intermediate energies

The authors separate the angular distributions of light-composite-particle-nucleus elastic and inelastic scattering at intermediate energies into 'positive'- and 'negative'-angle components. They show that if oscillations in the 'negative'-angle component of elastic scattering are due to refractive interference effects, there will be corresponding oscillations in the 'negative'-angle component of inelastic scattering which are in phase with those in the elastic scattering. This phase relation is independent of the multipolarity of the excitation.