High accuracy line positions of the ν 1 fundamental band of 14 N 2 16 O
KAUST DepartmentChemical Kinetics & Laser Sensors Laboratory
Clean Combustion Research Center
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2018-03-08
Print Publication Date2018-05
Permanent link to this recordhttp://hdl.handle.net/10754/627327
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AbstractThe ν1 fundamental band of N2O is examined by a novel spectrometer that relies on the frequency locking of an external-cavity quantum cascade laser around 7.8 μm to a near-infrared Tm:based frequency comb at 1.9 μm. Due to the large tunability, nearly 70 lines in the 1240 – 1310 cm−1 range of the ν1 band of N2O, from P(40) to R(31), are for the first time measured with an absolute frequency calibration and an uncertainty from 62 to 180 kHz, depending on the line. Accurate values of the spectroscopic constants of the upper state are derived from a fit of the line centers (rms ≈ 4.8 × 10−6 cm−1 or 144 kHz). The ν1 transitions presently measured in a Doppler regime validate high accuracy predictions based on sub-Doppler measurements of the ν3 and ν3-ν1 transitions.
CitationAlSaif B, Lamperti M, Gatti D, Laporta P, Fermann M, et al. (2018) High accuracy line positions of the ν 1 fundamental band of 14 N 2 16 O. Journal of Quantitative Spectroscopy and Radiative Transfer. Available: http://dx.doi.org/10.1016/j.jqsrt.2018.03.005.