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Low-energy positron scattering from C2H2

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Abstract

We present positron scattering cross sections with C2H2 molecules obtained with the Method of Continued Fractions in the static plus correlation polarization level. The differential and integral cross sections are compared with available theoretical and experimental approaches, and sensible improvement in the description of the qualitative behaviour of the differential cross sections is observed. These improvements are discussed through the evaluation of the average absolute differences between theoretical approaches and the respective normalized experimental data. Our elastic integral cross sections exhibit good agreement with model and ab initio approaches and with the available experimental data.

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Author information

Correspondence to Wagner Tenfen.

Additional information

Contribution to the Topical Issue “Low-Energy Positron and Positronium Physics and Electron-Molecule Collisions and Swarms (POSMOL 2019)” edited by Michael Brunger, David Cassidy, Saša Dujko, Dragana Marić, Joan Marler, James Sullivan, Juraj Fedor.

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Tenfen, W., Barp, M.V. & Arretche, F. Low-energy positron scattering from C2H2. Eur. Phys. J. D 74, 30 (2020). https://doi.org/10.1140/epjd/e2020-100439-5

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