Oxygen absorption in the spectral range 180–300 nm for temperatures to 3000 K and pressures to 50 atm.

Abstract

Calculated oxygen absorption coefficients are given for the spectral range 180–300 nm, at a spectral resolution of 0.05 nm (instrumental function half-width) and with a spectral increment of 0.0125 nm. The results are presented for temperatures between 300 and 3000 K, and for pressures between 1 and 50 atm. The spectra were first calculated at high resolution, preserving the natural shape of the spectral lines, using line-by-line techniques and Voigt line shapes. Absorption processes considered include the Schumann–Runge and Herzberg 1 band and continuum systems, including the pressure-dependent component usually ascribed to the formation of the (O2)2 dimer. The results were degraded before use, which allowed several approximations to be introduced into the computing procedures; these are discussed.