Single and double ionization of neon, krypton and xenon by positron impact

V. Kara, K. Paludan, J. Moxom, P. Ashley, G. Laricchia

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Measurements of the single (σi+) and the ratio of double to single (R2) ionization cross sections for positron impact on neon, krypton and xenon are presented from near threshold to 1000 eV. By multiplying the R2 values of each target by the appropriate σi+, new data for the corresponding double (σi2+) ionization cross sections have also been obtained. The ratio between positron and electron σi+ maxima is generally seen to be lower for higher target atomic number, as expected from the static interaction between the projectile and undistorted target. Comparison with available data suggests that Ps formation accompanied by the production of singly or doubly charged ions is a significant channel in positron-atom scattering.

Original languageEnglish
Pages (from-to)3933-3949
Number of pages17
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume30
Issue number17
DOIs
Publication statusPublished - Sep 14 1997

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krypton
neon
xenon
positrons
ionization cross sections
ionization
projectiles
thresholds
scattering
atoms
ions
electrons
interactions

ASJC Scopus subject areas

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

Cite this

Single and double ionization of neon, krypton and xenon by positron impact. / Kara, V.; Paludan, K.; Moxom, J.; Ashley, P.; Laricchia, G.

In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 30, No. 17, 14.09.1997, p. 3933-3949.

Research output: Contribution to journalArticle

Kara, V. ; Paludan, K. ; Moxom, J. ; Ashley, P. ; Laricchia, G. / Single and double ionization of neon, krypton and xenon by positron impact. In: Journal of Physics B: Atomic, Molecular and Optical Physics. 1997 ; Vol. 30, No. 17. pp. 3933-3949.
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