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15 November 2010 Results of measurements of the absolute spectral irradiance from O2(a)-O2-H2O gas produced by chemical singlet oxygen generator
M. V. Zagidullin, N. A. Khvatov, P. A. Mikheyev
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Proceedings Volume 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 77510N (2010) https://doi.org/10.1117/12.877909
Event: 18th International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2010, Sofia, Bulgaria
Abstract
Measurements of the absolute spectral irradiance from O2(a)-O2-H2O gas, produced by a chemical singlet oxygen generator, were performed. FWHM of singlet oxygen collision induced emission (CIE) at 634 and 703 nm have been measured in the temperature range 150-400 K. The measured rate constant of CIE at 634 nm - (6.72±0.8)×10-23 cm3/s is in agreement with the value of the band intensity of the collision induced absorption. The rate constant of CIE at 703 nm relates to the rate constant of CIE at 634 nm as 1.06. The efficient rate constant of 8×10-17cm3/s for the reaction O2(a)+O2(a)→"products" at about 360 K and the rate constant of (4.4±1)×10-17 cm3/s for the reaction O2(a)+O2(a)→O2(b)+O2 at about 330 K have been measured. These rates are larger than listed in the standard chemical oxygen-iodine laser (COIL) package. Nonequilibrium fraction of O2(b,v=1) was measured against water fraction. It was deduced that the maximum number of oxygen vibrational quanta, generated in the sequences of the reactions O2(a)+O2(a)→O2(b)+O2, O2(b)+H2O→O2+H2O, is less than 0.05. The analysis predicts that the fraction of vibrationally excited oxygen molecules at the exit of most-used chemical SOG most likely corresponds to the thermal equilibrium. Analysis of the data obtained from the tests of jet type SOG predicts O2(a) nascent yield of about 90%.
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M. V. Zagidullin, N. A. Khvatov, and P. A. Mikheyev "Results of measurements of the absolute spectral irradiance from O2(a)-O2-H2O gas produced by chemical singlet oxygen generator", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 77510N (15 November 2010); https://doi.org/10.1117/12.877909
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KEYWORDS
Oxygen
Carbon dioxide
Molecules
Chemical analysis
Chlorine
Temperature metrology
Chemical lasers
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