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Article Dans Une Revue Molecular Physics Année : 2020

Rydberg spectra of singlet metastable states of O2

Résumé

Updated analyses of several singlet Rydberg states of O2 via spectra involving excitation from the metastable a1Δg and b1Σg+ 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 3pπ1Σu+ v=0-4, 3pσ1Πu v=0-2, 3pπ1u v=0-2, 4pπ1Σu+ v=0-1, 4pσ1Πu v=0 and 4pπ1Δu v=0. This is complemented by high quality ab initio calculations on the 1Σu+ and 1u Rydberg states to determine the transition moments providing the first quantitative cross sections for Rydberg – b1Σg+ transitions. These are validated against the experimental data. The results suggest the most promising candidate for determining b1Σg+ number density is likely to be the 1-0 band of the 4pπ1Σu+ – b1Σg+ transition at 131.3 nm.
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Dates et versions

hal-02544881 , version 1 (08-09-2020)

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C. Western, Jean-Paul Booth, A. Chatterjee, N. de Oliveira. Rydberg spectra of singlet metastable states of O2. Molecular Physics, 2020, pp.e1741714. ⟨10.1080/00268976.2020.1741714⟩. ⟨hal-02544881⟩
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