Vol. 36, issue 04, article # 1

Borkov Yu. G., Sulakshina O. N., Serdyukov V. I., Sinitsa L. N. Spectroscopic parameters of the (3–0) vibrational band for the 15N16O molecule in the ground electronic state. // Optika Atmosfery i Okeana. 2023. V. 36. No. 04. P. 251–256. DOI: 10.15372/AOO20230401 [in Russian].
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The spectrum of the 15N16O molecule in the region 5200–5500 сm-1 is recorded and analyzed. As a result of the analysis, 150 L-doublets of vibration-rotational lines are found in the 3–0 band of the main transitions between the 21/2 and 23/2 electronic states. For 108 of them, when the splitting value was greater than 4.5 × 10-13 сm-1, it was possible to obtain the positions and relative intensities of each component of the doublet, while the self-expansion parameter was fixed to the value from HITRAN2020, and the intensities of the components e and f were considered equal. The maximum of the rotational quantum number J was 30.5. The frequencies of the transitions recorded, weighted in accordance with the experimental uncertainties, were processed by the program code using the non-linear least squares method. As a result of processing, the spectroscopic constants for the v = 3 vibrational state of the 15N16O isotopologue are found. The L-doubling constants for this state are determined for the first time. The results are compared with the well-known database of spectroscopic information HITRAN2020.


NO, isotopologue, registered spectrum, vibration band 3–0, spectroscopic constants


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