Raman Spectra of Nitrogen, Carbon Dioxide, and Hydrogen in a Methane Environment

Journal Article · Mon Jan 15 04:00:00 EST 2018 · Optics and Spectroscopy

DOI:https://doi.org/10.1134/S0030400X18010137· OSTI ID:22786582

Matrosov, I. I.; Sedinkin, D. O.; Zaripov, A. R. ^[1]

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1. Russian Academy of Sciences, Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch (Russian Federation)

Changes in the Raman spectra of N{sub 2}, H{sub 2}, and CO{sub 2} are studied in the range of 200–3800 cm{sup –1} depending on the concentration of surrounding CH{sub 4} molecules at a fixed medium pressure of 25 atm and temperature of 300 K. It has been found that changes in the spectral characteristics of purely rotational H{sub 2} lines in a CH{sub 4} medium are negligible, while the Q-branches of the v{sub 1}/2v{sub 2} Fermi dyad in СO{sub 2} become narrower and wavenumbers of its high-frequency component and v{sub 1} band of N{sub 2} decrease. In addition, under these conditions, the ratio of intensities of the CO{sub 2} Fermi dyad Q-branch varies in proportion to the concentration of surrounding molecules of CH{sub 4}. The obtained data will be used in diagnosing the composition of natural gas using Raman spectroscopy.

• OSTI ID: 22786582
• Journal Information: Optics and Spectroscopy, Journal Name: Optics and Spectroscopy Journal Issue: 1 Vol. 124; ISSN 0030-400X; ISSN OPSUA3
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATMOSPHERES
CARBON DIOXIDE
CONCENTRATION RATIO
DIAGNOSIS
HYDROGEN
METHANE
MOLECULES
NITROGEN
RAMAN SPECTRA