Convergent variational calculation of positronium-hydrogen-atom scattering lengths
Sadhan K. Adhikari, Puspajit Mandal
Abstract
We present a convergent variational basis-set calculational scheme for elastic scattering of positronium atom by hydrogen atom in S wave. Highly correlated trial functions with appropriate symmetry are needed for achieving convergence. We report convergent results for scattering lengths in atomic units for both singlet (=3.49 0.20) and triplet (=2.46 0.10) states.
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