Inelastic pion scattering from ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ has been studied by measuring the spectrum of pions down to 40 MeV at five angles between 30° and 134° for three incident pion energies: 114, 163, and 240 MeV. The spectra are dominated by a broad peak due to quasielastic scattering from a single nucleon in the nucleus. The systematics of the spectra are discussed with emphasis on the pion-nucleus interaction dynamics including the effect of absorption. The partial ${\pi }^{+}$-${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ cross sections for all nonradiative channels are estimated.

NUCLEAR REACTIONS ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}(\pi , {\pi }^{\prime })$ $E=114, 163, 240$ MeV. $\theta =30-134\mathrm{}°$, full inelastic spectrum measured; $\sigma \left(\theta \right)$. Discussion of nuclear medium effects on quasifree processes, $\Delta$ propagation.

• Received 23 August 1982

DOI:https://doi.org/10.1103/PhysRevC.27.1578