Calculations and measurements of N2O absorption at high temperature in the 4.5 μm region.

Statistics – Applications

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Molecular Spectra: Infrared Spectra

Scientific paper

An approximate N2O spectroscopic database suitable for high temperature and medium resolution applications has been created in the 4.5 μm region. Intensities of 14N216O hot bands have been extrapolated pragmatically from the ν3 band intensity and energies of vibrational levels have been computed by diagonalization of the effective Hamiltonian. The new parameters have been merged with the data available in the HITRAN database and in the recent experimental work of Toth. The entire list has then been used to generate individual line parameters. Pure N2O spectra have been recorded with a Fourier Transform spectrometer up to 900 K and with 1 cm-1 resolution. A good agreement between these spectra and line-by-line calculations using the new database is obtained while the use of HITRAN greatly underestimates absorption at high temperature.

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