Positronium formation in helium bubbles in 600 MeV proton-irradiated aluminium

K. O. Jensen, Morten Mostgaard Eldrup, Bachu Narain Singh

    Research output: Contribution to journalJournal articleResearchpeer-review


    Aluminium samples containing helium bubbles produced by 600 MeV proton irradiation at 430°C were investigated by positron annihilation; both lifetime and angular correlation measurements were made. The angular correlation curves contain an unusually narrow component. This component is associated with positronium formation in the bubbles. The width of the component indicates localisation of the Ps atom, possibly in a surface physisorbed state. Sodium segregated at the surfaces of the bubbles is a likely cause of the positronium formation
    Original languageEnglish
    JournalJournal of Physics F (Metal Physics)
    Issue number12
    Pages (from-to)L287-93
    Publication statusPublished - 1985


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