A spectrophone and a CO2 laser source were used to determine the absorption coefficients of NH3 at seventy-seven laser lines in the 00°1–02°0 band at 9.4 µm and the 00°1–10°0 band at 10.4 µm. The NH3 was buffered with N2 to 1 atm at 295 K; its concentration ranged from 30 ppm to 200 ppm. The absorption coefficients and their probable errors are tabulated.
© 1978 Optical Society of America
R. J. Brewer and C. W. Bruce, "Photoacoustic spectroscopy of NH3 at the 9-µm and 10-µm 12C16O2 laser wavelengths," Appl. Opt. 17, 3746-3749 (1978)