Ozone photolysis - Determination of the O/3P/ quantum yield at 266 nm

Direct production of O(3P) from the photodissociation of O3 at 266 nm has been observed by time-resolved resonance fluorescence following laser flash photolysis. The quantum yield for O(3P) production was determined to be 0.12 + or - 0.02 at this wavelength. This result confirms the qualitative observations of two previous photofragment studies and establishes an absolute value of the quantum yield for O(1D) production of 0.88. This value has been used as a basis for normalizing relative quantum yields in the fall-off region, and interpreting O(1D) kinetics studies.