Positronium scattering by atoms and molecules at low energies

Details Positronium scattering by atoms and molecules at low energies Positronium scattering by atoms and molecules at low energies

2001-09-12

arxiv.org/abs/physics/0109029v1

Nucl. Inst. Met. Phys. Res. B 192 (2002) 74-82

Physics

Chemical Physics

6 revtex pages, 3 postscript figures

Scientific paper

10.1016/S0168-583X(02)00709-7

The recent theoretical and experimental activities in positronium (Ps) scattering by atoms and molecules are reviewed with special emphasis at low energies. We critically compare the results of different groups $-$ theoretical and experimental. The theoretical approaches considered include the $R$-matrix and close-coupling methods applied to Ps-H, Ps-He, and Ps-Li scattering, and a coupled-channel approach with a nonlocal model-potential for Ps scattering by H, He, H$_2$, Ne, Ar, Li, Na, K, Rb, Cs, and Ps and for pickoff quenching in Ps-He scattering. Results for scattering lengths, partial, total and differential cross sections as well as resonance and binding energies in different systems are discussed.

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