Electron-like and resonant scattering of positronium

Recent progress on the study of positronium (Ps) scattering from atoms and molecules at University College London is reviewed. Following our findings (Brawley et al. Science 330 2010) concerning the similarity in shape and magnitude of the total cross-sections for equivelocity Ps atoms and electrons, enhancements have been observed in the Ps total cross-section for CO2 at velocities close to those at which resonances occur in the case of electrons. Further comparisons are also made between theoretical results for Ps scattering and experimental electron total cross-sections.