Single and double detachment from H-

Gerard Collins

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)


    Absolute cross sections for single and double detachment from H– following electron impact have been measured over a range of collision energies from the thresholds to 170 eV. The measurements were made using a magnetic storage ring. The ions in the ring were merged with a monoenergetic electron beam and neutral and positively charged fragments were detected. We cover larger energy ranges than in many of the previous experiments, and this is the first time both single and double detachment have been measured simultaneously. This allows us to present accurate ratios between the single and double detachment cross sections. On the basis of these ratio measurements we discuss possible mechanisms leading to double detachment.
    Original languageEnglish
    Pages (from-to)042707-1-042707-5
    Number of pages5
    JournalPhysical Review A
    Issue number4
    Publication statusPublished - Apr 2004

    ASJC Scopus subject areas

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


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