Temperature dependence of O2(1Δ)+O2(1Δ) and I(2<i>P</i>1/2)+O2(1Δ) energy pooling

Abstract

The electronic-energy pooling reactions forming O2(1Σ) are of critical importance to the overall mechanism of the O2(1Δ)–I atom transfer laser. In this study, we report temperature-dependent rate coefficient data for O2(1Δ)+O2(1Δ)→k2O2(1Σ)+O2(3Σ) and O2(1Δ)+I(2P1/2)→k3O2(1Σ)+I. These data were obtained using a temperature-controlled kinetic flow tube equipped with computer-controlled spectroscopic diagnostics. The fundamental data reported are k2(T)/k2(295) = (3.5±1.5)exp(−780/RT) and k3(T)/k2(T) = (5.5±1.0)×103. Both rate-coefficient ratios are reported for the temperature range T = 259 to 353 K. The results are compared with earlier measurements of these processes.