Unexpected frequency shifts and linewidth changes for rovibrational lines in the infrared emission spectra of CO2 excited by active nitrogen |
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| Institution: | 1. Department of Chemical and Biomolecular Engineering, Lehigh University, B336 Iacocca Hall, 111 Research Drive, Bethlehem, PA 18015, USA;2. Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden;1. Institute of Monitoring of Climatic and Ecological Systems SB RAS, 10/3 Academicheskiy Ave, 634055 Tomsk, Russia;2. Tomsk State University, 36 Lenina Ave, 634050 Tomsk, Russia;1. Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, ON, Canada K1A 0R6;2. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China;3. College of Engineering, Peking University, Beijing 100871, China;1. Chemistry Department, Queen’s University, Kingston, Ontario K7L 3N6, Canada;2. Missouri University of Science and Technology, Rolla, MI 65409, USA |
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| Abstract: | Fourier transform emission spectra from flowing CO2 excited by active nitrogen have been recorded in the 4.5 μm region, with a resolution of 0.0054 cm−1, for different time intervals between the mixing of the two gases and observation of the emission. Significant frequency shifts (reaching 30 times the absolute uncertainty of the experimental frequencies) and linewidth changes are observed depending on the time interval and the value of the quantum number v3, for thousands of rovibrational lines belonging to v1v12v3 → v1v12(v3-1) vibrational transitions. |
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