https://doi.org/10.1140/epjd/s10053-023-00777-4
Regular Article – Atomic and Molecular Collisions
High-resolution and high-precision measurements of total cross section for electron scattering from CO
1
Department of Chemistry, Tokyo Institute of Technology, 152-8551, Tokyo, Japan
2
Department of Materials and Life Sciences, Sophia University, 102-8554, Tokyo, Japan
3
Department of Chemistry, Tokyo Metropolitan University, 192-0397, Tokyo, Japan
4
Quantum Materials and Applications Research Center, National Institutes for Quantum Science and Technology, 370-1292, Takasaki, Gunma, Japan
Received:
28
September
2023
Accepted:
28
October
2023
Published online:
14
November
2023
Absolute grand total cross section for electron scattering from CO is obtained in the energy range from 20 eV down to 9 meV with a very narrow electron energy width of 11 meV using the threshold-photoelectron source employing synchrotron radiation. Although the obtained grand total cross section shows the general features of the cross-section behavior known for the low-energy electron scattering from CO, namely the marked rise below 2 eV and the resonance enhancement at about 4 eV, several new features were revealed, especially at the 
resonance. The energy position for the maxima of the grand total cross section at the resonance appeared to be lower than that has been known. Also found are clear oscillatory structures resolved on the broad enhancement of the grand total cross section at around the resonance. The present measurement also revealed a threshold feature due to the vibrational excitation of asymmetric stretch mode in the grand total cross section. The vibrational excitation cross section for asymmetric stretch mode at the threshold is estimated from the feature.
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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.
