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Positronium - Matter Interactions
Recent studies of positronium (Ps) scattering from atoms and molecules at University College London have unveiled 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. The efficiency for collimated positronium production by charge-exchange in positron collisions with gaseous targets has been investigated at high energies and CO2 has been found to be approximately twice as efficient as N2, the previous best neutralising gas at high energies. The efficiency from Xe, whilst lower at low energies, becomes comparable to that from H2 at around 100–120 eV; at ~250 eV, it is an order of magnitude lower.
2 Researchers
1 External Collaborators
  • Dr Laszlo Sarkadi
    Hungarian Academy of Sciences - Hungary
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