Abstract
Calculations of the s-wave scattering of electrons by positronium with energy less than 7.35 eV are reported in a simple static exchange model based on the for e--H, the full static exchange model, and an accurate variational model. The pattern of the results is similar to that for scattering by atomic hydrogen. The lowest 1S resonance is seen at Er=4.768 eV with a width of 1.6 meV. The zero-energy limit of the elastic cross section is close to 228 pi a02.