Wavenumbers, strengths, widths and shifts with pressure of lines in four bands of gaseous 16O2 in the systems a1Δg−X3Σg− and b1Σg+−X3Σg−

Abstract In spectra of gaseous oxygen at 299 K with pressure/bar in the range [0.13,1.06] and lengths of absorbing path up to 107 m, we measured the wavenumbers, strengths, widths and shifts with pressure of 118 mostly fully resolved lines of 16O2 due to rotational fine structure in the band a 1 Δ g (v=0)−X 3 Σ g − (v=0) , 59 lines in the band b 1 Σ g + (v=0)−X 3 Σ g − (v=0) , 58 lines in the band b 1 Σ g + (v=1)−X 3 Σ g − (v=0) and 43 lines in the band b 1 Σ g + (v=2)−X 3 Σ g − (v=0) ; the latter band is measured quantitatively for the first time. Spectral parameters to reproduce wavenumber data are considerably improved over previously existing data. Band strengths, average widths and shifts of lines with pressure of pure O2 are presented, and extensive comparison of these results is made with corresponding values from the literature.

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