Laser induced fluorescence (LIF) detection of highly vibrationally excited O-2 resulting from visible photolysis of pure O-3 is attributed to the title reaction. The vibrational and rotational energy distributions as well as Doppler profiles of selected product states of the nascent O-2 were obtained. Predictions of quasiclassical trajectory calculations on the "Varandas-Pais" potential energy surface (l) are inconsistent with observation. This points out the need for a more accurate nb initio study of this important reaction. The implications for nonlocal thermodynamic equilibrium chemistry in the stratosphere are discussed.