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The recombination of atomic oxygen Public Deposited

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  • The three-body heterogeneous and wall recombination coefficients for atomic oxygen were measured using an electron paramagnetic resonance spectrometer to monitor the time dependence of the atomic oxygen concentration. This measurement was made for a pressure range of from .224 to 1.10 torr using pyrolysis of ozone as a source of oxygen atoms. The three-body heterogeneous rate constant, k1, with molecular oxygen as the third body was determined independent of ozone concentration to be (5.43 ± . 08) x 10-34 cc 2 molecule-2 sec-1 The wall recombination efficiency, y, for a fused metaphosphoric acid-sodium metaphosphate mixture, the wall coating, was found to be 9.1 x 10-6. The recombination coefficient, k1, resulting from a computer fit of the data to the usual recombination model is compared to literature values obtained from discharged oxygen, ozone pyrolysis, and chemiluminescence measurements. The role that ozone concentration plays throughout the atomic oxygen decay and the possible effects of its neglect is discussed.
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