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Rotational excitation of tetrahedral and octahedral molecules caused by electron and positron impact

Momentum transfer, integral and differential cross sections

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Abstract

Rotational excitation cross sections of tetrahedral and octahedral molecules caused by low energy positron/electron impact are the subject of this work. We developed a scattering model considering the Born approximation and the asymptotic multipole potential. These assumptions permitted us to achieve analytical expressions for rotational integral, momentum transfer and differential cross sections. We have found good agreement for positron and marginal agreement for electron interactions. The model can be improved with the inclusion of exchange effects and the distortion of the scattering wave function.

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Correspondence to Marcos V. Barp.

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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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Barp, M.V., Arretche, F. Rotational excitation of tetrahedral and octahedral molecules caused by electron and positron impact. Eur. Phys. J. D 73, 244 (2019). https://doi.org/10.1140/epjd/e2019-100444-5

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  • DOI: https://doi.org/10.1140/epjd/e2019-100444-5

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