Abstract
S-, P- and D-wave Feshbach resonances in positron-sodium scattering have been investigated by using the momentum space coupled-channels optical method. The target continuum and positronium (Ps) formation channels are included via an optical potential. Feshbach resonances below the target excitation and Ps (n = 2) formation thresholds are predicted and the effects of channel-coupling scheme, target continuum and Ps formation channels on the resonance energy and resonance width are discussed. We have also found the Wigner cusp structures at the inelastic channel-opening thresholds in positron-sodium scattering cross sections.
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Jiao, L., Zhou, Y., Cheng, Y. et al. Feshbach resonances in positron scattering from sodium. Eur. Phys. J. D 66, 48 (2012). https://doi.org/10.1140/epjd/e2012-20529-3
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DOI: https://doi.org/10.1140/epjd/e2012-20529-3