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The rate constants of the three-body recombination reaction + 02 + (M = He, N2, H20) were measured from 4.79 to 30.1 Torr at room temperature by the discharge-flow technique. The respective rate constants obtained are (2.6 ± 0.2) X 10~32, (6.1 ± 0.9) X 10-32, and (6.4 ± 0.8) X 10'31 cm6 s"1. Although the rates for He and N2 can be rationalized in terms of existing theory, that for H20 implies a collision efficiency greater than 1. This situation can be rectified by use of the total quantum mechanical scattering cross section instead of the Lennard-Jones cross section commonly used.

have been measured by the discharge‐flow technique to be 2.6·10‐32, 6.1·10‐32, and 6.4·10‐31 cm6s‐1 respectively.

The HO2 generation via the title reaction is studied in the third‐order regime by use of a high‐pressure discharge flow apparatus.

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