Fourier transforms CO spectra near 1.19 µm

Line parameters of the 4-0 band of carbon monoxide by high sensitivity cavity ring down spectroscopy near 1.2 µm

“…This is the subject of the present contribution performed with a newly purchased ECDL. Similar arguments of validation of HITRAN line intensities have motivated a very recent FTS study of the 4-0 band performed in Tomsk with a 30-m long cell providing a pathlength on the order of 1 km [7]. The high resolution spectra recorded at 146 and 374 Torr were used to derive line intensities with uncertainties between 2 and 3% for the strongest lines and to fit the 4-0 effective dipole moment parameters of the 12 C 16 O isotopologue.…”

“…[4] (blue diamonds), the FTS and calculated values of Ref. [7] (green and red triangles, respectively) are compared to HITRAN2016 values [6].…”

“…As mentioned in the introduction, very recently, new FTS recordings of CO were performed in Tomsk with a km absorption pathlength and dedicated to the measurements of the 4-0 line intensities [7]. Line intensities were reported with uncertainties between 2 and 3% for the strongest lines, from spectra recorded at 146 and 374 Torr analyzed with a quadratic seed-dependent Voigt profile (qsdVP).…”

“…Parts 3-5, are devoted to the analysis of the obtained line positions, line intensities and line profile parameters and their comparison with literature results. [7], by CRDS in Ref. [4] and in this work (green, blue and red symbols, respectively) are superimposed to the HITRAN2016 line list 6] (black circles).…”

“…We present in Fig. 1 an overview of the HITRAN2016, Tomsk [7], previous [4] and present CRDS measurements. In the following part 2, the setup, spectra recordings, line profile fitting procedures are described.…”