CONVERGENT CLOSE-COUPLING CALCULATIONS OF POSITRON-HYDROGEN $S$-WAVE MODEL

Alisher Kadyrov$^*$ and Igor Bray

The Flinders University of South Australia,
G.P.O. Box 2100, Adelaide 5001, Australia}

We consider positron-hydrogen scattering within the $S$-wave
model, where only states of zero orbital angular momentum are
included. Convergence is studied as a function of a Laguerre-based
pseudostate expansion of both the atomic and positronium states.