Fourier-transform spectroscopy of 13C17O and deperturbation analysis of the A1Π (υ=0–3) levels

The high-resolution B1Σ+→A1Π (0, 0) and (0, 3) emission bands of the less-abundant 13C17O isotopologue have been investigated by Fourier-transform spectroscopy in the visible region using a Bruker IFS 125HR spectrometer at an accuracy 0.003cm-1. These spectra are combined with high-resolution photoa...

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Published in:Journal of quantitative spectroscopy & radiative transfer 2017-03, Vol.189, p.312-328
Main Authors: Hakalla, R., Niu, M.L., Field, R.W., Heays, A.N., Salumbides, E.J., Stark, G., Lyons, J.R., Eidelsberg, M., Lemaire, J.L., Federman, S.R., de Oliveira, N., Ubachs, W.
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Language:eng
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Summary:The high-resolution B1Σ+→A1Π (0, 0) and (0, 3) emission bands of the less-abundant 13C17O isotopologue have been investigated by Fourier-transform spectroscopy in the visible region using a Bruker IFS 125HR spectrometer at an accuracy 0.003cm-1. These spectra are combined with high-resolution photoabsorption measurements of the 13C17O B1Σ+←X1Σ+ (0, 0), B1Σ+←X1Σ+ (1, 0) and C1Σ+←X1Σ+ (0, 0) bands recorded with an accuracy of 0.01cm-1 using the vacuum ultraviolet Fourier-transform spectrometer, installed on the DESIRS beamline at the SOLEIL synchrotron. In the studied 17,950–22,500cm-1 and 86,800–92,100cm-1 regions, 480 transitions have been measured. These new experimental data were combined with data from the C→A and B→A systems, previously analyzed in 13C17O. The frequencies of 1003 transitions derived from 12 bands were used to analyze the perturbations between the A1Π (υ=0–3) levels and rovibrational levels of the d3Δi, e3Σ-, a'3Σ+, I1Σ- and D1Δ states as well as to a preliminary investigation of weak irregularities that appear in the B1Σ+ (υ=0) level. Deperturbed molecular constants and term values of the A1Π state were obtained. The spin-orbit and L-uncoupling interaction parameters as well as isotopologue-independent spin-orbit and rotation-electronic perturbation parameters were derived. [Display omitted] •VUV–VIS FT-spectroscopy is applied.•High-resolution spectra of the 13C17O B←X, C←X and B→A systems were obtained.•Deperturbation analysis of the A1Π was performed.•The isotopologue-independent perturbation parameters were derived.
ISSN:0022-4073
1879-1352