First analysis of the ν 2 +ν 7 and ν 2 +ν 9 and ν 2 +ν 6 combination bands of HNO 3 : evidence of perturbations due to large amplitude OH torsion in the 2 1 9 1 excited state
| Autor: | R. Armante, Laurent Manceron, A. Perrin, F. Kwabia-Tchana, D. Doizi, Pascale Roy |
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| Přispěvatelé: | Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), De la Molécule aux Nanos-objets : Réactivité, Interactions et Spectroscopies (MONARIS), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin BP 48, 91192 Gif-sur-Yvette Cedex, France., CEA- Saclay (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), ANR-19-CE29-0013,QUASARS,Spectroscopie quantitative pour la télédétection atmosphérique : des mesures simultanées IR/THz à la télédétection satellitaire(2019) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
010504 meteorology & atmospheric sciences Biophysics OH large amplitude torsional splitting 010402 general chemistry 01 natural sciences chemistry.chemical_compound Nitric acid Molecular Physics HITRAN [CHIM]Chemical Sciences Physical and Theoretical Chemistry Molecular Biology 0105 earth and related environmental sciences Line (formation) [PHYS]Physics [physics] GEISA Torsion (mechanics) HNO3 Condensed Matter Physics 0104 chemical sciences nitric acid Amplitude chemistry Excited state [SDE]Environmental Sciences HITRAN Atomic physics |
| Zdroj: | Molecular Physics Molecular Physics, Taylor & Francis, 2021, ⟨10.1080/00268976.2021.1987543⟩ Molecular Physics, 2021, ⟨10.1080/00268976.2021.1987543⟩ |
| ISSN: | 0026-8976 1362-3028 |
| Popis: | International audience; This paper is the first of two back-to-back works, whose goal is to update the existing line positions and intensities spectroscopic parameters for the 5.8 µm region of nitric acid in the HITRAN or GEISA spectroscopic databases. This first study is devoted to the generation of first linelists for the ν2+ν9-ν9, ν2+ν7-ν7 and ν2+ν6-ν6 hot bands in the 5.8 µm region, whereas the second study will concern the positions and intensities for the ν2 band centred at 1709.567 cm−1. High-resolution Fourier transform spectra were recorded in the 5.8 µm and in the 4.2–4.6 µm spectral ranges. The identification of the ν2+ν9, ν2+ν7 and ν2+ν6 bands of HNO3 at 2165.0036, 2285.9657 and 2351.216 cm−1, respectively, was performed, and several assignments were confirmed by searching for ν2+ν9-ν9 and ν2+ν7-ν7 transitions within those of ν2 at 5.8 µm. Both ν2+ν6 and ν2+ν9 bands are highly perturbed. Surprisingly, both ν2+ν9 and ν2+ν9-ν9 bands exhibit large amplitude torsional splittings of ∼0.043 cm−1. This is presumed to be due to the existence of an anharmonic resonance that couples together the 2191 energy levels with those of a dark state involving high excitation in the ν9 large amplitude OH torsional mode. |
| Databáze: | OpenAIRE |
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