Spectral intensities in the ν3 bands of 12CH4 and 13CH4

Dang-Nhu, M.; Pine, A. S.; Robiette, A. G.

doi:10.1016/0022-2852(79)90196-6

Cited by 73 publications

(22 citation statements)

References 30 publications

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“…Several works have been devoted to the study of the intensities of methane in the 3-5 m region (1,2,3). In their theoretical analysis of the 3 band intensities, Dang-Nhu et al (4) included the interactions with other bands indirectly. However, the first global analysis of the intensities of the Pentad band system of methane ( 1 , 3 , 2 2 , 2 ϩ 4 and 2 4 ) in the 3-5 m region was published in 1983 (5).…”

Section: Introductionmentioning

confidence: 99%

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The Intensities of Methane in the 3–5 μm Region Revisited

Féjard

Champion

Jouvard

et al. 2000

Journal of Molecular Spectroscopy

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Section: Introductionmentioning

confidence: 99%

“…This study used line positions recorded with the FTS at Orsay (6) and intensity data taken from the AFGL compilation (7). The experimental intensities were laser measurements of Dang-Nhu et al (4) for the strongest allowed lines of 3 combined with mainly grating data from Toth et al (8) for the weaker transitions. The reported rms was 12%.…”

Section: Introductionmentioning

confidence: 99%

The Intensities of Methane in the 3–5 μm Region Revisited

Féjard

Champion

Jouvard

et al. 2000

Journal of Molecular Spectroscopy

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“…where [14]. From here A mn ≃ 4 Hza and it is only small part of all spontaneous relaxation of m-term (without collisions) as the last is ν m | P =0 ≃ 100 Hza [37].…”

Section: Radiationmentioning

confidence: 82%

“…Here the covariant spherical componentsÎ ςq are standardly defined and similar with (14). The difference β (79) 37 Respectively, from top to bottom hyperfine components of Fig.…”

Section: High-j Approximation Of Hfs Of Nor/m In 13 Chmentioning

confidence: 99%

“…NOR/M was observed in the intensity of linearly polarized infrared (IR) radiation of He-Ne/ 12 CH 4 laser without frequency tuning. This radiation has wave length λ = 3.39 µm and well hits in the absorption bands of vibration-rotation spectrum of methane isotopes, namely, [14]. Our in-cavity cell was completely elongated in the solenoidal magnetic scanner and portionly filled with methane at pressure P = 1 ÷ 10 mtorr.…”

Section: Introductionmentioning

confidence: 99%

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Sub-collision hyperfine structure of nonlinear-optical resonance with field scanning

Gus'kov¹,

Kovalevsky²,

Rudavets³

et al. 2004

Journal of Molecular Spectroscopy

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Some experimental evidences for methane are produced that the simple transition from frequency scanning of nonlinear-optical resonances to magnetic one may be accompanied with transition from sub-Doppler collisionally broadened structure to sub-collision hyperfine one. It is conditioned by nonlinearity of splitting of hyperfine sublevel for molecules in the adiabatically varied magnetic field and respectively breaking the analogy of magnetic and frequency scannings. The exact calculation of the resonance structure is considered for molecules with only one spin subsystem. The approximately spin-additive calculation of the structure is given for sufficiently fast rotating molecules with greater number of spin subsystems. Within the same approximation an example of hyperfine doubling in the magnetic and electric spectra of nonlinear-optical resonance is considered for fluoromethane.

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Photo‐Initiated Reduction of CO₂ by H₂ on Silica Surface

et al. 2018

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The reduction of CO is a promising route to produce valuable chemicals or fuels and create C-neutral resource cycles. Many different approaches to CO reduction have been investigated, but the ability of vacuum UV (VUV) irradiation to cleave C-O bonds has remained largely unexplored for use in processes that convert CO into useful products. Compared with other photo-driven CO conversion processes, VUV-initiated CO reduction can achieve much greater conversion under common photochemical reaction conditions when H and non-reducible oxides are present. Infrared spectroscopy provides evidence for a chain reaction initiated by VUV-induced CO splitting, which is enhanced in the presence of H and silica. When the reaction is carried out in the presence of silica or alumina surfaces, CO yields are increased and CH is formed as the only other detected product. CH production is not promoted by traditional photocatalysts such as TiO under these conditions. Assuming improvements in lamp and reactor efficiencies with scale up, or coupling with other available CO/CO hydrogenation techniques, these results reveal a potential, simple strategy by which CO could be valorized.

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Spectral intensities in the ν3 bands of 12CH4 and 13CH4

Cited by 73 publications

References 30 publications

The Intensities of Methane in the 3–5 μm Region Revisited

The Intensities of Methane in the 3–5 μm Region Revisited

Sub-collision hyperfine structure of nonlinear-optical resonance with field scanning

Photo‐Initiated Reduction of CO₂ by H₂ on Silica Surface

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Spectral intensities in the ν3 bands of 12CH4 and 13CH4

Cited by 73 publications

References 30 publications

The Intensities of Methane in the 3–5 μm Region Revisited

The Intensities of Methane in the 3–5 μm Region Revisited

Sub-collision hyperfine structure of nonlinear-optical resonance with field scanning

Photo‐Initiated Reduction of CO2 by H2 on Silica Surface

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Photo‐Initiated Reduction of CO₂ by H₂ on Silica Surface