We report rotationally resolved opacity functions, product rotational distributions, and differential cross sections for the O-16 + (OO)-O-16-O-16 (v = 0,j = 1) -> (OO)-O-16-O-16 (' = 0,j') + O-16 and (OO)-O-18-O-18 (v = 0,j = 1) -> (OO)-O-18-O-18 (v' =0,j') +(18)Ocollisions calculated by a time-independent quantum mechanical method employing one of the latest potential energy surface of ozone [Dawes; et al. (J. Chem. Phys. 2013, 139, 201103]. The results obtained for both collisional systems in the energy range 0.001-0.2 eV are, examined, and interesting mass scaling effects have been discovered. The shapes of product angular distributions suggest a transition from an indirect to a direct scattering, via an osculating intermediate complex.