Fine structure branching ratios and Doppler spectra of O(3P j) produced by the reaction of H+O2 → OH+O

초록

O(2p3P<inf>j</inf> ) atoms produced from the reaction between H( 1s2S) and O<inf>2</inf>(X3Z<inf>g</inf>- ) at collision energies (E<inf>coll</inf> ) of 2.5 and 2.1 eV are detected by a resonance enhanced multiphoton ionization technique. From the Doppler profile measurements of O(3P<inf>j</inf>), the average kinetic energy released to the products is estimated. The results suggest that the average fraction of the kinetic energy disposal at E<inf>coll</inf> = 2.1 eV is larger than that at E<inf>coll</inf> = 2.5 eV. The obtained branching ratios of O( 3P<inf>j</inf> ) j = 2, 1, and 0 at <inf>Ecoll</inf> = 2.5 eV are (0.70 ± 0.02), (0.21 ± 0.02), and (0.09 ± 0.02), and those at E<inf>coll</inf> = 2.1 eV are (0.63 ± 0.02), (0.25 ± 0.04), and (0.12 ± 0.02), respectively, with error bars of ± σ The results suggest that the nonadiabatic couplings at the last stage of the reaction are important for the determination of the ratios. © 1991 American Institute of Physics.