Ultraviolet photoabsorption in the <i>B</i><sup>3</sup>Σ<sup>-</sup> − <i>X</i><sup>3</sup>Σ<sup>-</sup> and <i>C</i><sup>3</sup>Π − <i>X</i><sup>3</sup>Σ<sup>-</sup> band systems of SO sulphur isotopologues

نویسندگان

چکیده

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 B3Σ−(v=4−30)←X3Σ−(v=0) C3Π(v=0−7)←X3Σ−(v=0) bands observed or inferred the 43,000–51,000 cm−1 (196 to 233 nm) spectral range. This is first experimental detection C3Π(v>2) level any these an S-substituted isotopologue. Additional measurements A3Π(v=1−3)←X3Σ−(v=0) provide calibration SO column density. Measured band profiles fitted effective-Hamiltonian model coupled excited B 3Σ− C 3Π states along their predissociation linewidths absorption strengths. Electronic-state potential-energy curves transition moments deduced. end result list line frequencies, f-values, dissociation widths describing photodissociation spectrum that accurate enough for computing atmospheric photolytic isotope-fractionation. Linelists, cross sections available as supplementary data.

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ژورنال

عنوان ژورنال: Molecular Physics

سال: 2022

ISSN: ['1362-3028', '0026-8976']

DOI: https://doi.org/10.1080/00268976.2022.2153092