Collisions of positronium (Ps) with the noble gases helium, neon, argon, krypton and xenon are considered in a two stage approach. Firstly, 'target elastic' collisions, where the noble gas target does not change state, are dealt with within the Impulse approximation. Secondly, collisions where the atom does change state, 'target inelastic' collisions, are considered within the first Born approximation. In both cases it is the spectra of ejected positrons and electrons that is the focus. Finally, isomorphism of the dipositronium (Ps2 ) symmetry group with the point symmetry group D2d is shown. Projection operators are obtained for collisional calculations of Ps with Ps.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:486201 |
| Date | January 2008 |
| Creators | Starrett, Charles Edward |
| Publisher | Queen's University Belfast |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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