A simple model of resonance dominated quasi-elastic scattering

We examine a highly simplified model of projectile-nucleus scattering in which the elementary interactions are resonance dominated. The essential element introduced into the ''nuclear'' dynamics is a shift of spectral strength to an energy comparable with or greater than the resonance half-width. The interplay of the energy dependences yields strong sensitivity to the underlying dynamics. Phenomenological treatments based on simplified nuclear dynamics, such as the Δ-hole model, are seen to reproduce inclusive observables. They do less well on more exclusive observables and can be misleading in their implications for the underlying physics. (orig.)