Pion inelastic scattering at 180 MeV from the low-lying collective states of ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$ is analyzed using distorted-wave impulse approximation calculations with no free parameters and transition densities obtained from electron scattering. These calculations adequately reproduce the pion scattering data. No significant ${\pi }^{+}$ vs ${\pi }^{-}$ differences are observed at low-momentum transfers.

[NUCLEAR REACTIONS: ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({\pi }^{\pm },{\pi }^{{\pm }^{\prime }})$ and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}({\pi }^{\pm },{\pi }^{{\pm }^{\prime }})$, $E_{\pi }=180\mathrm{}$ MeV. Measured $\sigma \left(\theta \right)$, DWIA analysis, ${\pi }^{+}$ vs ${\pi }^{-}$ comparisons.]

• Received 4 November 1980

DOI:https://doi.org/10.1103/PhysRevC.24.231