Photoelectron imaging of the SO3 anion: vibrational resolution in photoelectron angular distributions*

Anstöter, Cate S.; Verlet, Jan R.R.

Abstract

The photoelectron imaging of the pyramidal sulphite radical monoanion is presented in the photon energy range spanning 3.10–4.45 eV. Two features are seen corresponding to formation of the ground electronic state of the neutral and to thermionic emission, which is seen for hv > 3.7 eV. Photoelectron spectra corresponding to direct detachment show vibrational structure associated with the v2 umbrella mode of the neutral. A similar structure is seen in the photoelectron angular distributions. The photoelectron angular distributions were modelled and agree with experiment. However, we cannot provide an explanation for the observed vibrational structure in the photoelectron angular distributions. The observed thermionic emission is assigned to the excitation to a pair of degenerate Feshbach resonances, which can internally convert and subsequently emit electrons statistically.

Citation

Anstöter, C. S., & Verlet, J. R. (2021). Photoelectron imaging of the SO3 anion: vibrational resolution in photoelectron angular distributions*. Molecular Physics, 119(1-2), Article e1821921. https://doi.org/10.1080/00268976.2020.1821921

• Journal Article Type: Article
• Acceptance Date: Sep 1, 2020
• Online Publication Date: Sep 24, 2020
• Publication Date: 2021
• Deposit Date: May 6, 2021
• Publicly Available Date: Sep 24, 2021
• Journal: Molecular Physics
• Print ISSN: 0026-8976
• Electronic ISSN: 1362-3028
• Publisher: Taylor and Francis Group
• Peer Reviewed: Peer Reviewed
• Volume: 119
• Issue: 1-2
• Article Number: e1821921
• DOI: https://doi.org/10.1080/00268976.2020.1821921
• Public URL: https://durham-repository.worktribe.com/output/1275808