Line-shape study of CO perturbed by N_2 with mid-infrared frequency comb-based Fourier-transform spectroscopy
arxiv(2024)
摘要
We developed a mid-infrared optical frequency comb-based Fourier-transform
spectrometer and performed a line-shape study of the fundamental vibrational
band of CO perturbed by N_2, which is crucial for atmospheric science and
astronomical observations. The comb-based FTS enabled us to measure the whole
vibrational band with high resolution and precision at several pressures
between 10 and 400 Torr. Observed absorption profiles were fitted with the
speed-dependent Voigt profile. Collisional broadening, speed-dependent
collisional width and shift coefficients are derived. The reliability of our
results is established from considerations of systematic errors and comparison
with previous studies.
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