Journal
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
Volume 266, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jqsrt.2021.107563
Keywords
Formaldehyde; Line list; Ro-vibrational energy; MARVEL analysis
Categories
Funding
- STFC [ST/M001334/1, ST/R000476/1]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [883830]
- NKFIH [K119658]
- ELTE Institutional Excellence Program - Hungarian Ministry of Human Capacities [TKP2020-IKA-05]
- Universitadi Bologna (RFO funds)
- MIUR (Project PRIN 2015: STARS in the CAOS) [2015F59J3R]
- [VEKOP-2.3.216-2017-000]
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This study analyzed high-resolution rotation-vibration transitions of (H2CO)-C-12-O-16 and provided 5029 empirical energy levels, which were used to improve the line list for hot formaldehyde.
Published high-resolution rotation-vibration transitions of (H2CO)-C-12-O-16, the principal isotopologue of methanal, are analyzed using the MARVEL (Measured Active Rotation-Vibration Energy Levels) procedure. The literature results are augmented by new, high-accuracy measurements of pure rotational transitions within the ground, nu(3), nu(4), and nu(6) vibrational states. Of the 16 596 non-redundant transitions processed, which come from 43 sources including the present work, 16 403 could be validated, providing 5029 empirical energy levels of (H2CO)-C-12-O-16 with statistically well-defined uncertainties. All the empirical rotational vibrational energy levels determined are used to improve the accuracy of ExoMol's AYTY line list for hot formaldehyde. The complete list of collated experimental transitions, the empirical energy levels determined, as well as the extended and improved line list are provided as Supplementary Material. (C) 2021 Elsevier Ltd. All rights reserved.
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