High-resolution one-photon absorption spectroscopy of the D 2 Σ − ← X 2 Π system of radical OH and OD

Vacuum-ultraviolet (VUV) photoabsorption spectra were recorded of the and bands of the OH and OD radicals generated in a plasma-discharge source using synchrotron radiation as a background continuum coupled with the VUV Fourier-transform spectrometer on the DESIRS beamline of synchrotron SOLEIL. Hig...

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Bibliographic Details
Published in:Journal of quantitative spectroscopy & radiative transfer 2018-01, Vol.204, p.12-22
Main Authors: Heays, A.N., de Oliveira, N., Gans, B., Ito, K., Boyé-Péronne, S., Douin, S., Hickson, K.M., Nahon, L., Loison, J.C.
Format: Article
Language:English
Subjects:
Astrophysics
Physics
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Summary:Vacuum-ultraviolet (VUV) photoabsorption spectra were recorded of the and bands of the OH and OD radicals generated in a plasma-discharge source using synchrotron radiation as a background continuum coupled with the VUV Fourier-transform spectrometer on the DESIRS beamline of synchrotron SOLEIL. High-resolution spectra permitted the quantification of transition frequencies, relative f-values, and natural line broadening. The f-values were absolutely calibrated with respect to a previous measurement of (Wang et al., 1979). Lifetime broadening of the excited and levels is measured for the first time and compared with previous experimental limits, and implies a lifetime 5 times shorter than a theoretical prediction (van der Loo and Groenenboom, 2005). A local perturbation of the level in OH was found.
ISSN:0022-4073
DOI:10.1016/j.jqsrt.2017.08.021