A direct measurement of the O(1D) quantum yields from the photodissociation of ozone between 300 and 328 nm

The relative quantum yields of O(1D) produced in the photolysis of ozone at 298 K between 300 and 328 nm have been measured directly by resonance-enhanced multiple photon ionisation of the fragment. Clear indications are seen of a tail in the quantum yield extending to the long-wavelength limit of the experiments. Comparisons with previous studies are made to assess the importance of the photolysis of vibrationally excited molecules and spin-forbidden dissociation at wavelengths beyond the 310 nm thermodynamic threshold for the formation of both atomic and molecular oxygen in their singlet states.