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Optica Publishing Group
  • International Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 1990),
  • paper QWD44

Photochemical ozone production in oxygen at 248 nm

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Abstract

It has been previously demonstrated1 that irradiation of pure oxygen at near atmospheric pressures by unfocused 248-nm excimer laser radiation can produce equilibrium ozone densities exceeding 1015 cm−3, although radiation at this wave-length falls 0.12 eV short of the energy required to dissociate O2. Ozone is generated at a very low density by an undefined mechanism. These molecules are then photodissociated to produce an oxygen atom plus a vibrationally excited O2 molecule (quantum yield = 0.1). A second photon dissociates the molecule so that three atoms (and henee three new O3 molecules) are generated from each ozone molecule which undergoes this sequence, and the process is autocatalytic.

© 1990 Optical Society of America

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