Inclusive (π±,π0) reactions in nuclei

Nuclear pion single-charge exchange has been studied using a method of ${\pi }^0$ detection based on the spectroscopy of the back-angle $\gamma$-ray decay. Charge-exchange scattering from nuclei ranging from Be to Pb was studied for incident pion energies of 50 and 100 MeV. The angular distributions and ${\pi }^0$ energy spectra beyond 60° suggest effects characteristic of quasifree scattering. Total charge-exchange cross sections are larger than values suggested by optical-model calculations.