https://doi.org/10.1140/epjd/e2019-100444-5
Regular Article
Rotational excitation of tetrahedral and octahedral molecules caused by electron and positron impact
Momentum transfer, integral and differential cross sections⋆
Departamento de Fsica, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil
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Received:
12
September
2019
Received in final form:
18
October
2019
Published online:
26
November
2019
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.
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.
© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2019
