science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: oxygen Other Names: Formula: O2 CAS-No.: 7782-44-7 Study: UV absorption cross sections at high temperatures Authors: I.E. Zabelinskii, L.B. Ibragimova, O.P. Shatalov Title: Determination of absorption cross sections for oxygen molecules in the Schumann-Runge band region at high temperatures Journal/Source: J. Applied Spectroscopy, 73 (1), 10-15, (2006); DOI: 10.1007/s10812-006-0030-3 Data: table, diagram Energy/Wavelength range: 190 - 250 nm Resolution: Temperature: 1500 - 7000 K Temperature dependence: Pressure/Concentration: 0.15 - 1.4 atm Phase: gas pH: Comments: The authors have measured the absorption cross sections of oxygen molecules in oxygen and in an oxygen-argon mixture heated by a shock wave, in the wavelength range 190-250 nm at temperatures of 1500-7000 K. In order to approximate the temperature dependence of these cross sections at a temperature of 1500-4500 K, the authors chose the function sigma(lambda, T) = sigma0(lambda)(1 - exp (-Theta/T)) exp (- n*Theta/T) where Theta0 = 1.4 x 10-17, 1.4 x 10-17, 1.2 x 10-17, and 1.3 x 10-17 cm2, n* = 3.1, 4.1, 5.6, and 7.47 for wavelengths 190, 210, 230, and 250 nm, respectively; Theta = 2240 K is the characteristic temperature of the O2 molecules. Author to whom correspondence should be addressed: (e-mail address):