Abstract
In an effort to explore computational methods to investigate resonances in atomic systemsinvolving positrons, we present a calculation of resonances in positronium–hydrogenscattering, using the stabilization method. The density of resonance states is calculatedusing extensive Hylleraas-type wavefunctions. Resonance energies and widths for three S,two P, and two D states are determined, from the stabilization plots of the density ofresonance states. Our results, obtained by using a real algorithm, are in goodagreement with those obtained by using the method of complex-coordinate rotation.
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