Wavelengths of rotational lines in the water-vapor bands at 0.93 and 1.13 microns

C.C. Kiess
1952 Journal of research of the National Bureau of Standards  
The infraied water-vapor bands at 0.93 and 1.13 microns have been photographed with the grating spectrographs of the National Bureau of Standards. These bands appear in absorption in the continuous spectrum of white-light sources, part or all of the optical path being in air. They appear also in emission in the spectra of flames containing hydrogen and oxygen compounds. In relatively short light-paths, the rotational lines of these bands are sharp and show little or no tendency toward
more » ... cy toward diffuseness, even in air for which the relative humidity is 90 percent. Their wavelengths may be measured with accuracy on high-dispersion spectrograms. Wavelengths, estimated intensities, and wave numbers, as derived from the spectrograms, are presented. The wavelengths are recommended for use in calibrating infrared spectrometers.
doi:10.6028/jres.048.047 fatcat:b6cw24y4ezdaljnffjf3grqxem