Rydberg spectra of singlet metastable states of O2

Updated analyses of several singlet Rydberg states of O 2 via spectra involving excitation from the metastable a 1 Δ g and states are presented. The high-quality FT-VUV spectra available from the DESIRS beamline at the SOLEIL synchrotron gives significantly improved spectra compared to previous work...

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Bibliographic Details
Published in:Molecular physics 2021, Vol.119 (1-2)
Main Authors: Western, C. M., Booth, J.-P., Chatterjee, A., de Oliveira, N.
Format: Article
Language:English
Subjects:
Chemical Physics
Excitation spectra
Metastable state
metastable states
oxygen
Physics
Plasma Physics
Rydberg states
Spectroscopy
Synchrotrons
vacuum ultraviolet
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Summary:Updated analyses of several singlet Rydberg states of O 2 via spectra involving excitation from the metastable a 1 Δ g and states are presented. The high-quality FT-VUV spectra available from the DESIRS beamline at the SOLEIL synchrotron gives significantly improved spectra compared to previous work. The Rydberg states analysed include v = 0-4, 3pσ 1 Π u v = 0-2, 3pπ 1 Δ u v = 0-2, v = 0-1, 4pσ 1 Π u v = 0 and 4pπ 1 Δ u v = 0. This is complemented by high-quality ab initio calculations on the and 1 Δ u Rydberg states to determine the transition moments providing the first quantitative cross-sections for Rydberg - transitions. These are validated against the experimental data. The results suggest the most promising candidate for determining number density is likely to be the 1-0 band of the transition at 131.3 nm.
ISSN:0026-8976
1362-3028
DOI:10.1080/00268976.2020.1741714