Abstract
High-resolution far-ultraviolet broadband Fourier-transform photoabsorption spectra of 32S16O, 33S16O, 34S16O, and 36S16O are recorded in a microwave discharge seeded with SO2. The (Formula presented.) and (Formula presented.) bands are observed or inferred in the (Formula presented.) –51,000 cm−1 (196 to 233 nm) spectral range. This is the first experimental detection of a (Formula presented.) level and of any of these observed bands in an S-substituted isotopologue. Additional measurements of (Formula presented.) provide a calibration of the SO column density. Measured band profiles are fitted to an effective-Hamiltonian model of coupled excited B 3Σ− and C 3Π states along with their predissociation linewidths and absorption band strengths. Electronic-state potential-energy curves and transition moments are deduced. The end result is a list of line frequencies, f-values, and dissociation widths describing the far-ultraviolet photodissociation spectrum of SO that is accurate enough for computing atmospheric photolytic isotope-fractionation. Linelists, and photoabsorption and photodissociation cross sections are available as supplementary data.
Original language | English (US) |
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Article number | e2153092 |
Journal | Molecular Physics |
Volume | 121 |
Issue number | 17-18 |
DOIs | |
State | Published - 2023 |
Keywords
- Ultraviolet spectroscopy
- isotopologues
- photoabsorption
- predissociation
- sulphur monoxide
ASJC Scopus subject areas
- Biophysics
- Molecular Biology
- Condensed Matter Physics
- Physical and Theoretical Chemistry
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Dive into the research topics of 'Ultraviolet photoabsorption in the B 3Σ- − X 3Σ- and C 3Π − X 3Σ- band systems of SO sulphur isotopologues'. Together they form a unique fingerprint.Datasets
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Ultraviolet photoabsorption in the B³Σ⁻—X³Σ⁻ and C³Π—X³Σ⁻ band systems of SO sulphur isotopologues
Heays, A. N. (Contributor), Stark, G. (Contributor), Lyons, J. R. (Contributor), de Oliveira, O. N. (Contributor), Lewis, B. R. (Contributor), Gibson, S. T. (Contributor), Lyons, J. R. (Contributor) & Gibson, S. T. (Contributor), Zenodo, Jun 30 2021
DOI: 10.5281/zenodo.7423903, https://zenodo.org/record/7423903
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