Journal of Physical Chemistry p. 4956 - 4960 (1988)
Update date:2022-08-11
Topics:
Horowitz
Von Helden
Simon
Crutzen
Moortgat
Ozone formation in the 214-mm photolysis of oxygen at pressures ranging from 380 to 1300 Torr was investigated. The rates of ozone formation increase with the square of oxygen pressure mirroring the pressure dependence of the absorption cross sections of oxygen. This observation demonstrates the importance of the collision-induced changes in oxygen absorbance and points to a need to examine the role of oxygen dimer (O//2)//2 in reactions initiated by its photodissociation. Because of the high dilution of ozone, its formation was found to be linear with time even though, on the average, its rate of photolysis exceeded the rate of its generation from oxygen. The quantum yield of ozone formation was 1. 86 plus or minus 0. 17 independent of O//2 pressure.
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