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Energy-sharing asymmetries in ionization by positron impact

Arcidiacono, C; Kover, A; Laricchia, G; (2005) Energy-sharing asymmetries in ionization by positron impact. PHYS REV LETT , 95 (22) , Article 223202. 10.1103/PhysRevLett.95.223202. Green open access

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Abstract

The triply differential cross section of molecular hydrogen for ionization by 50 eV positrons has been determined, for the first time, for both the ejected electron in coincidence with the remnant ion and for the scattered projectile. Asymmetries in the energy sharing between the two light particles in the final state are observed, with the electron spectrum being shifted to significantly lower (and the scattered positron to correspondingly higher) energies than expected. A similar shape is observed in the case of the ejected electron spectrum from a helium target at the same excess energy.

Type: Article
Title: Energy-sharing asymmetries in ionization by positron impact
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.95.223202
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.95.223202
Language: English
Additional information: © 2005 The American Physical Society
Keywords: DIFFERENTIAL CROSS-SECTIONS, ANTIPARTICLE IMPACT, ELECTRON-CAPTURE, ARGON ATOMS, COLLISIONS, CONTINUUM, HYDROGEN, H-2, SPECTROSCOPY, SCATTERING
UCL classification: UCL
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/192528
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