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Search for positron quasibound states in the doubly excited region of the helium atom

Machacek, Joshua; Boadle, Roisin; Buckman, Stephen; Sullivan, James


Recent calculations by Bromley have indicated that the He(2s21Se) state will bind a positron. The e+He(2s21Se) state has a binding energy of 0.447 eV with respect to the He(2s21Se) state. Binding of a positron to the He 2s2 state has been predicted to give rise to two resonances in positron scattering from ground-state helium: e+He(2s21Se) at 57.3716 eV and a 2Po shape resonance just above the He(2s21Se) threshold at 57.8485 eV. To investigate these predicted resonances, low-energy positron...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Physical Review A: Atomic, Molecular and Optical Physics
DOI: 10.1103/PhysRevA.86.064702
Access Rights: Open Access


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