Measurement of the Differential Cross Section forπ−p→nπ0at 317, 452, and 491 MeV/c

Seventeen differential cross sections of the pion-nucleon charge-exchange reaction have been measured at total center-of-mass energies of 1245, 1337, and 1363 MeV. Most measurements are based on the neutron-photon coincidence method, using carefully calibrated neutron counters and an efficient, large-area photon detector. The results are used to test the predictions of charge independence, with which they agree. The results also confirm the Ayed-Bareyre-Sonderegger phase-degeneracy hypothesis at ${\tilde{\theta }}_{{\pi }^0}=180\mathrm{}°$.