Resonances in Three- and Four-Body Atomic Systems involving Electrons and Positrons
The recent advances in theoretical studies of atomic resonances in three- and four-body systems by using the method of complex-coordinate rotation are reviewed. Resonances in (e − e + e −), and the ls2s2 2S e resonance in e −-He scattering are discussed. Other applications of the method include doubly excited states of H− under the influence of external electric fields, as well as photoionization of He, with and without the presence of external electric fields.
KeywordsExternal Electric Field Complex Eigenvalue Photoionization Cross Section Bound State Polis Ground State Helium
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