Elastic scattering of 19.5 and 30 MeV negative pions fromC12

Elastic cross sections for the scattering of negative pions from $^{12}\mathrm{C}$ were measured at 19.5 and 30 MeV incident pion energy. At both energies the new cross sections show fair agreement with optical model predictions. At 30 MeV the new cross sections disagree at forward angles with previously measured values, while at 19.5 MeV the data represent the first report of $^{12}\mathrm{C}$ ${\ensuremath{\pi}}^{\mathrm{\ensuremath{-}}}$ scattering at this energy.