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Cavity-enhanced saturated absorption spectroscopy of the (30012) - (00001) band of 12C16O2.
Tan, Y; Xu, Y-R; Hua, T-P; Liu, A-W; Wang, J; Sun, Y R; Hu, S-M.
Afiliação
  • Tan Y; Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
  • Xu YR; Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
  • Hua TP; Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
  • Liu AW; Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
  • Wang J; Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
  • Sun YR; Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
  • Hu SM; Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
J Chem Phys ; 156(4): 044201, 2022 Jan 28.
Article em En | MEDLINE | ID: mdl-35105067
ABSTRACT
The (30012) ← (00001) band of 12C16O2 in the 1.6 µm region is used for satellite observation of carbon dioxide in the Earth's atmosphere. Here, we report a Doppler-free spectroscopy study of this band with comb-locked wavelength-modulated cavity-enhanced absorption spectroscopy. Frequencies of 18 transitions with the rotational quantum numbers up to 42 were determined with sub-kHz accuracy, corresponding to a fractional uncertainty at the 10-12 level. With this precision, we revealed an anomalous decrease of the line shift and an increase of the line broadening for the Lamb dips of CO2 in the low-pressure regime compared to values obtained from Doppler-limited spectra at higher pressures.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Chem Phys Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Chem Phys Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China