Spectrum of induced absorption of oxygen in mixtures with various gases in the region of the Herzberg photodissociation continuum

Values of the binary absorption coefficients are obtained for the region of Herzberg photodissociation continuum in mixtures of oxygen with various foreign gases X, where X - Ar, Kr, Xe, N2, N2O, CH4, C3H8, CO2, NH3, NF3, SF6, CF4, C2F6, C3F8, CF3H, CF3Cl, CF3Br, CF2ClH, CF2Cl2 - group I (the ionization potential of molecules >= 11 eV) and C2H4, CF3I, C2F5I - group II (the ionization potential < 11 eV). The induced absorption of the mixtures of O2 with gases from group I is found to result from the Herzberg III band of oxygen. The obtained regular dependence of the intensity of induced absorption in an O2 - X pair on the ionization potential of a molecule X, confirms the hypothesis that excited electronic states of the ionic type of the molecular pair serve as the main intensity source for the Herzberg III band. The long-wavelength wing of the charge transfer band of the O2 - X pair is shown to contribute to the induced absorption of the mixtures of O2 with gases from group II.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.