Angle-integrated cross-section measurements for the reaction ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$(${\pi }^{+}$,${\pi }^0$${)}^{13}$ N(g.s.), made with activation techniques, are presented for the energy range 50–350 MeV. These results are compared to earlier data for the same reaction and to differential cross-section measurements on other light nuclei. A deep minimum is observed near 70 MeV in the excitation function; it reflects the s- and p-wave interference minimum seen in the free-nucleon single-charge-exchange cross section. The data are compared to several optical-model calculations.

• Received 28 March 1988

DOI:https://doi.org/10.1103/PhysRevC.38.2761