Backwardπ−preactions between 0.6 and 1.0 GeV/c

Measurements are reported of the differential cross section for the reaction ${\pi }^{-}p\to {\pi }^{-}p,{\pi }^{0}n,\mathrm{and}\eta n$ at three angles close to 180° and for incident momenta in the range 0.6 to 1.0 GeV/c. The three measurements were made simultaneously at 1% intervals of beam momentum. The data on elastic scattering resolve a discrepancy between two earlier experiments. They also show clearly the effect of the opening of the $\eta n$ channel. The charge-exchange data show that $I$-spin bounds are not violated in the kinematic region covered. The $\eta n$ data can be adequately described with known $s$-channel resonances. No evidence for narrow $N^{*}\text{'}\mathrm{s}$ is seen in any channel.