https://doi.org/10.1140/epjd/s10053-023-00787-2
Regular Article - Atomic and Molecular Collisions
Low-energy positron scattering by small hydrocarbons: methane, acetylene, ethylene, and ethane molecules
Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, 81531-980, Curitiba, Paraná, Brazil
Received:
1
October
2023
Accepted:
21
November
2023
Published online:
11
December
2023
In the present work, we used the recently parallelized version of the Schwinger multichannel method to calculate positron scattering cross sections by methane, acetylene, ethylene, and ethane in the static plus polarization approximation. These calculations, marked by heightened computational demands compared to our previous work, exhibit significantly improved agreement with most recent experimental data. Furthermore, we investigate the potential existence of bound states in our calculations through the analysis of scattering lengths. Our findings demonstrate a superior agreement with both theoretical predictions and experimental measurements when compared with previous computational approaches.
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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.
