Positron attachment to the He(ns2 1Se) states

James Mitroy, Janina Grineviciute

    Research output: Contribution to journalArticlepeer-review


    Calculations based on the projection method and using explicitly correlated Gaussians are used to confirm the existence of positron attachment to two doubly excited states of helium. The e+He(2s2 1Se) and e +He(3s2 1Se) states have binding energies of 0.449 and 0.286 eV. These estimates of the resonance energies are nearer to the variational limit than previous calculations. These states will exist as resonances in the e +-He scattering continuum, and complex rotation calculations have been used to estimate their widths.
    Original languageEnglish
    Article number22710
    Pages (from-to)1-6
    Number of pages6
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Issue number2
    Publication statusPublished - Aug 2013


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