Ion production by positron impact on H2O

C. Arcidiacono, J. Beale, Z. D. Peić, Á Kövér, G. Laricchia

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12 Citations (Scopus)


The energy distributions of positrons scattered around 0° from H 2O have been measured in coincidence with the remnant ions (H 2O+, OH+ and H+) at 100 eV and 153 eV incident energies. The maxima of the distributions (d2σ/ dE+dΩ) associated with the production of OH+ and H+ are about 5-10 times smaller than that for H2O +. At both incident energies, a small shoulder has been observed at ∼28 eV in the energy loss spectra associated with H2O+ production possibly arising from a shake-up band associated with the 2a 1 orbital. The branching ratios for the H+ and HO + fragments are also presented.

Original languageEnglish
Article number065205
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number6
Publication statusPublished - Apr 9 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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