Intensities of 2ν4 and 2ν2 methane Raman bands as a function of pressure

D. V. Petrov; I. I. Matrosov; A. S. Tanichev

doi:10.1117/12.2575495

12 November 2020 Intensities of 2ν₄ and 2ν₂ methane Raman bands as a function of pressure

D. V. Petrov, I. I. Matrosov, A. S. Tanichev

Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 115600A (2020) https://doi.org/10.1117/12.2575495
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation

Abstract

In the range of 2500–3500 cm^–1of methane Raman spectrum there are two bands (2ν₄ and 2ν₂) which are under Fermi resonance with an intense ν₁ band. It was found that when the pressure changes from 1 to 55 atm, the peak intensity of the 2ν₄ band increases by ~ 9% and peak intensity of the 2ν₂ band increases by ~ 6.5% relative to the ν₁intensity. An analysis of the integrated intensities showed that in this pressure range the ratio 2ν₄/ν₁ increases by ~ 7%, the ratio 2ν₂/ν₁ (taking into account the additional contribution of the lines of the ν₃ band) increases by ~ 0.7%.

Citation Download Citation

D. V. Petrov, I. I. Matrosov, and A. S. Tanichev "Intensities of 2ν₄ and 2ν₂ methane Raman bands as a function of pressure", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 115600A (12 November 2020); https://doi.org/10.1117/12.2575495

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