Abstract
An energy-dependent analysis of elastic scattering of {pi}{sup +} from {sup 12}C, {sup 16}O, and {sup 40}Ca is made based on differential cross sections and (in one case) reaction cross sections. A nonlocal optical model is used to provide the energy variation between data sets. Structure is found in the s- and p-wave phase shifts. {copyright} {ital 1998} {ital The American Physical Society}