Knowledge Bank

The absorption of light by hot oxygen (300 to $1000\circ K$) in the spectral region from 1750 to 2100 {\AA} has been investigated photoelectrically with a 2.2m McPherson scanning monochrometer at a bandwidth of 0.075{\AA}. The absorption chamber was a modification of that employed in this labortory in the study of alkali metal $vapors.1.2$ At $600\circ K$ the $v″=1$ bands are as strong as the corresponding $v″=0$ bands, and at $1000\circ K$ the $v″=2,3$ bands become apparent. Using selected Schumann-Runge lines measured previously by Curry and $Herzberg3$ and Brix and $Herzberg.4$ as standards, the wavelengths of these new lines have been measured to an estimated accuracy of $\pm 0.03${\AA}. Details of the experimental techniques, wavelength measurements, and the calculated spectroscopic constants of the $B3\Sigma u-$ state will be presented.