Fragmentation of positronium

C. Starrett, M.T. McAlinden, Harry Walters

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


The impulse approximation is used to calculate cross sections for fragmentation of Ps(1s) in collision with He, Ne, Ar, Kr, and Xe. Triple, double, single, and total cross sections are evaluated. Reasonably good agreement is found with the measurements of Armitage [Phys. Rev. Lett. 89, 173402 (2002)] on Ps(1s)+He(1(1)S) scattering. These absolute measurements comprise the total Ps ionization cross section and the cross section differential with respect to the longitudinal energy of the ejected positron. Characteristics of free electron and free positron scattering are explored in the double and triple differential cross sections for Ps(1s)+Xe scattering.
Original languageEnglish
Article number012508
Pages (from-to)012508-1-012508-14
Number of pages14
JournalPhysical Review A
Issue number1
Publication statusPublished - Jul 2005

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)


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