High sensitivity absorption spectroscopy of acetylene near 1.2 µm

Lyulin, O.M.; Kassi, S.; Campargue, A.

doi:10.1016/j.jqsrt.2021.107733

Cited by 3 publications

(6 citation statements)

References 29 publications

(93 reference statements)

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“…To complete the extensive works [1,2] performed for acetylene in the ΔP = 13 spectral region (8200-8900 cm −1 ), we propose in this work the recommended line list for the atypical ν 1 +ν 3 +3ν 4 1 Q-branch which is well isolated from other acetylene bands and is strong enough to be detected. Modified line positions and intensities calculated using EH and EDM operator from Ref.…”

Section: Discussionmentioning

confidence: 99%

“…1 is observed from FTS with absorption path length of around one kilometer. In the previous cited studies [1,2] the experimental conditions did not allow to perform analysis, the Q-branch being saturated on CRDS spectrum recorded at 10 Torr and analyzed in Ref. [2] and on the contrary too weak on FTS spectra [1] recorded with around 50 m absorption path length.…”

Section: Introductionmentioning

confidence: 99%

“…In the previous cited studies [1,2] the experimental conditions did not allow to perform analysis, the Q-branch being saturated on CRDS spectrum recorded at 10 Torr and analyzed in Ref. [2] and on the contrary too weak on FTS spectra [1] recorded with around 50 m absorption path length. The Q-branch of the ν 1 +ν 3 +3ν 4 1 band may be interesting under strong acetylene absorption conditions since the Q-branch is well isolated from main ΔP =13 absorption region (see graphical abstract and a zoom of ν 1 +ν 3 +3ν 4 1 band presented in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Acetylene molecule has been extensively studied both from experimental and theoretical point of view. Recent Fourier Transform Spectroscopy (FTS) [1] and Cavity Ring Down Spectroscopy (CRDS) [2] measurements of acetylene in ΔP = 13 region located between 8200 and 8900 cm −1 allowed the analysis of line positions and intensities of stronger bands (from FTS) and weaker bands (from CRDS). P is the polyad number defined as P = 5V 1 + 3V 2 + 5V 3 + V 4 + V 5 , where V i are the vibrational normal mode quantum numbers, with i = 1−5.…”

Section: Introductionmentioning

confidence: 99%

“…Based on Refs. [1,2], a complete line list for around 20 bands of 12 C 2 H 2 acetylene is now included in the latest 2020 edition of atmospheric and planetary databases HITRAN [3] and GEISA [4]. Among those bands, the weak ν 1 +ν 3 +3ν 4 1 band present an atypical Q-branch that is reversing around 8330.007 cm −1 at J = 9.…”

Section: Introductionmentioning

confidence: 99%

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The Q-branch of ν1+ν3+3ν4 band of 12C2H2 located at 8330 cm−1

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et al. 2022

Journal of Quantitative Spectroscopy and Radiative Transfer

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Q-branch of ν1+ν3+3ν4 band of 12C2H2 located at 8330 cm−1

Jacquemart

Lyulin

Solodov

et al. 2022

Journal of Quantitative Spectroscopy and Radiative Transfer

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Using nested tensor train contracted basis functions with group theoretical techniques to compute (ro)-vibrational spectra of molecules with non-Abelian groups

Rey,

Carrington

2024

The Journal of Chemical Physics

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In this paper, we use nested tensor-train contractions to compute vibrational and ro-vibrational energy levels of molecules with five and six atoms. At each step, we fully exploit symmetry by using symmetry adapted basis functions obtained from an irreducible tensor method. Contracted basis functions are determined by diagonalizing reduced dimensional Hamiltonian matrices. The size of matrices of eigenvectors, used to account for coupling between groups of coordinates, is reduced by discarding rows and columns. The size of the matrices that must be diagonalized is thus substantially reduced, making it possible to use direct eigensolvers, even for molecules with five and six atoms. The symmetry-adapted contracted vibrational basis functions have been used to compute J = 0 energy levels of the CH3CN (C3v) and J > 0 levels of CH4.

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High-sensitivity methane monitoring based on quasi-fundamental mode matched continuous-wave cavity ring-down spectroscopy

Li¹,

Yang²,

Zhang³

et al. 2022

Chinese Phys. B

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Continuous-wave cavity ring-down spectroscopy (CW-CRDS) is an important technical means to monitor greenhouse gases in atmospheric environment. In this paper, a continuous-wave cavity ring-down spectroscopy system is built to meet the needs of atmospheric methane monitoring. The problem of mode matching is explained from the perspective of transverse mode and longitudinal mode, and the influence of laser injection efficiency on measurement precision is further analyzed. The results of cavity ring-down time measurement show that the measurement precision is higher when the laser is coupled with the fundamental mode. In the experiment, DFB laser is used to calibrate the system with standard methane concentration, and a measurement error of 1.1% is obtained. The methane concentration in the air is monitored in real time for two days. The results show the consistency of the concentration changes over the two days, which further demonstrate the reliability of the system for the measurement of trace methane. By analyzing the influence of mode matching, it not only assists the adjustment of the optical path, but also further improves the sensitivity of the system measurement.

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High sensitivity absorption spectroscopy of acetylene near 1.2 µm

Cited by 3 publications

References 29 publications

The Q-branch of ν1+ν3+3ν4 band of 12C2H2 located at 8330 cm−1

The Q-branch of ν1+ν3+3ν4 band of 12C2H2 located at 8330 cm−1

Using nested tensor train contracted basis functions with group theoretical techniques to compute (ro)-vibrational spectra of molecules with non-Abelian groups

High-sensitivity methane monitoring based on quasi-fundamental mode matched continuous-wave cavity ring-down spectroscopy

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