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The momentum-space coupled-channel optical method has been applied to positron-helium scattering. The ionization continuum and the positronium formation channels are included via a complex equivalent-local optical potential. The positronium formation cross sections at the energy range from the threshold to 4000.3em0exeV and the total scattering cross sections at the energies from 17 to 5000.3em0exeV are reported and compared with available experimental measurements and theoretical calculations. The agreements between the present results and the corresponding measurements are satisfactory.
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Cheng et al. (2007) studied this question.
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