Positronium binding to potassium and other alkali atoms

James Mitroy, G. G. Ryzhikh

    Research output: Contribution to journalComment/debate


    The fixed-core stochastic variational method has been used to demonstrate the existence of an electronically stable ground state for potassium positride, KPs, with a binding energy of 0.003 275 Hartree. The 2 annihilation rate of 2.001 × 109 s-1 was almost the same as the annihilation rates computed previously for LiPs and NaPs. Analysis of the radial expectation values, the annihilation rates and the e--e+ correlation function reveal that KPs can be regarded as a Ps cluster moving in the field of the neutral atom.
    Original languageEnglish
    Pages (from-to)3839-3848
    Number of pages10
    JournalJournal of Physics B: Atomic, Molecular and Optical Physics
    Issue number15
    Publication statusPublished - 1999


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