Measuring the positron affinities of atoms

James Mitroy, G. G. Ryzhikh

    Research output: Contribution to journalComment/debate


    It is proposed that the binding energies of positrons to a number of atoms be determined by the charge transfer reaction A− +e+ !Ae+ +e−. This reaction can be realized in the laboratory by directing a negative ion beam through a positron trap and measuring positively charged ions downstream. Unique identification of Ae+ is possible when the electron affinity, positron affinity and neutral atom ionization potentials satisfy a few simple identities. This technique could be used to investigate the existence of positron binding for a number of elements such as Si, Fe, Cu, Ge, Ru, Ag, Sn, Sb, Ta, W, Au, Pb and Bi.
    Original languageEnglish
    Pages (from-to)411-417
    Number of pages7
    JournalJournal of Physics B: Atomic, Molecular and Optical Physics
    Issue number15
    Publication statusPublished - 1999


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