Elastic and inelastic scattering of 291-MeV pions byBe9, Si,Ni58, andPb208

Angular distributions for the elastic and inelastic scattering of 291-MeV ${\pi }^{+}$ and ${\pi }^{-}$ by ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$, Si, ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$, and ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ have been measured. The characteristics of two first-order optical potentials have been investigated, and reasonable agreement with the elastic scattering data has been obtained. Macroscopic distorted-wave impulse approximation calculations of the inelastic scattering with Kisslinger potentials are reasonably successful in reproducing the experimental data. The inelastic scattering results for ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$ provide evidence for the importance of radial localization effects in pion inelastic scattering.