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Fragmentation of positronium in collision with He atoms

Armitage, S; Leslie, DE; Garner, AJ; Laricchia, G; (2002) Fragmentation of positronium in collision with He atoms. PHYS REV LETT , 89 (17) , Article 173402. 10.1103/PhysRevLett.89.173402. Green open access

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Abstract

The absolute cross section for the fragmentation of positronium in collision with He atoms has been measured. The results are compared with available theories. The longitudinal energy distributions of positrons resulting from fragmentation have also been determined and are found to display a peak situated just below half the residual energy. This is suggestive of the occurrence of "electron loss to the continuum" in which the two residual charged particles lie in a low relative-velocity Coulomb-continuum state.

Type: Article
Title: Fragmentation of positronium in collision with He atoms
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.89.173402
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.89.173402
Language: English
Keywords: CLOSE-COUPLING APPROXIMATION, DIFFERENTIAL CROSS-SECTIONS, IMPACT IONIZATION, SCATTERING, HYDROGEN, GASES, BEAM, EXCHANGE, HELIUM, H-2
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/9715
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