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A theroretical and experimental investigation has been carried out to determine the absorption coefficient of molecular oxygen at high temperature. The wavelength range was chosen to cover the Schumann-Runge continuum between 1,300 and 1,750 angstrom units. The theoretical investigation covered temperatures from 300° to 10,000° K. The experimental investigation was carried out in the range from 4,000° to 10,000° K.
The High Temperature Aspects of Hypersonic Flow is a record of the proceedings of the AGARD-NATO Specialists' Meeting, held at the Technical Centre for Experimental Aerodynamics, Rhode-Saint-Genese, Belgium in April 1962. The book contains the papers presented during the meeting that tackled a broad range of topics in the aspects of hypersonic flow. The subjects covered during the meeting include pressure measurements, interference effects, the use of wind tunnels in aircraft development testing, high temperature gas characteristics, boundary layer research, stability and control and the use of rocket vehicles in flight research. Aerospace engineers and aeronautical engineers will find the book invaluable.
In the process of calculating opacities which are needed as input data for radiation transport problems, the absorption cross sections for various species has to be known. One factor in the cross section is the vibrational transition probability, called the Franck-Condon factor (FCF). This report presents input data needed to calculate these from Rydberg-Klein potentials as well as tables of Franck-Condon factors for species of atmospheric interest. (Author).
The ability of molecular oxygen to absorb light in the Schumann-Runge ultraviolet region of the spectrum has been used to follow the change in concentration of molecular oxygen as a function of time behind shock waves in oxygen and in a mixture of 10-percent oxygen in argon. Analysis of the records obtained yielded values for the dissociation rate of oxygen as a function of temperature over the range 4,000° to 10,000°K. The highest previously reported experimental results in the literature were at 7,500°K.