QUANTUM DYNAMICAL RATE-CONSTANT FOR THE H-3 REACTION USING A 6-DIMENSIONAL DOUBLE MANY-BODY EXPANSION POTENTIAL-ENERGY SURFACE REVISITED(O)

New quantum dynamics computations of the rate constant for the atmosph eric reaction H + O-3 --> O-2 + OH are reported. These calculations ha ve been carried out under the assumption of an atom-to-atom reactive p rocess scheme rather than on the basis of the global atom-molecule rea ctive scattering approach reported in a previous paper by the same aut hors (J. Phys. Chem. 1997, 101, 8817). Agreement with the available cl assical trajectory results are now notably improved, although the new theoretical results still continue to agree best with the more recent experimental data of Clyne and Monkhouse and Greenblatt and Wiesenfeld for the title reaction.