Spectral representation of the three-body Coulomb problem. II. Autoionizing doubly excited states of unnatural parity in helium

Eiglsperger, Johannes;Piraux, Bernard;Madronero, Javier
(2010) Physical review. A, Atomic, molecular, and optical physics — Vol. 81, n° 4 (2010)

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Authors
  • Eiglsperger, JohannesUCLouvain
    Author
  • Piraux, BernardUCLouvain
    Author
  • Madronero, JavierUCLouvain
    Author
Abstract
A spectral approach of configuration interaction type is used to evaluate energies and widths for a wide range of singlet and triplet P-e resonance states of helium up to the eighth single ionization threshold. While the present data are in excellent agreement with existing theoretical results (below the N = 3-5 ionization threshold) obtained within an explicitly correlated approach, there are substantial differences with the energies, the widths, and the number of resonances obtained with the stabilization method.
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Eiglsperger, J., Piraux, B., & Madronero, J. (2010). Spectral representation of the three-body Coulomb problem. II. Autoionizing doubly excited states of unnatural parity in helium. Physical review. A, Atomic, molecular, and optical physics, 81(4). https://doi.org/10.1103/PhysRevA.81.042528 (Original work published 2010)