https://doi.org/10.1140/epjd/s10053-023-00778-3
Regular Article – Atomic and Molecular Collisions
Positron-hydrogen scattering: internal consistency and threshold behaviour for excited states
1
Department of Physics and Astronomy, Curtin University, Kent St, Bentley, 6102, Perth, WA, Australia
2
Institute of Nuclear Physics, 100214, Ulugbek, Tashkent, Uzbekistan
3
Department of Physics and Astronomy, University of Nebraska-Lincoln, 68588-0299, Lincoln, NE, USA
Received:
25
September
2023
Accepted:
27
October
2023
Published online:
10
November
2023
The positron-hydrogen collision system is considered with the one- and two-centre convergent close-coupling methods with a particular focus on initial excited states. The previous limitation on the two-centre method, restricting the Laguerre basis size, has been removed allowing for larger bases, which is necessary for the examination of the near-threshold cross section behaviour for three-body breakup. Excellent agreement with the Wannier–Klar predictions for these systems is found for initial states with principal quantum number 
. The accuracy of the presented cross sections is supported by demonstrating internal consistency of the one- and two-centre calculations.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
