Abstract
A complete spectroscopic study of 22 ammonia transitions belonging to the ν 2 fundamental band has been undertaken using a high-resolution Fourier transform spectrometer. More than 80 spectra of pure ammonia were recorded at different conditions of temperature (235, 264, and 296 K) and pressure (160–2000 Pa). Special attention was paid to the determination of the absolute wavenumber scale and of the ammonia partial pressure, which allowed to determine absolute positions (8×10 −5 cm −1), absolute intensities (<2%) and self-broadening coefficients (<2%) with high accuracy. Measured intensities show a mean difference of more than 13% compared to intensities extracted from the HITRAN (2008) database while absolute positions are in very good agreement (−3.3×10 −5 cm −1) with database values. Self-pressure shift coefficients are also reported.
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