Abstract

We report rate coefficients for electronic quenching of NO (A²∑⁺, v' = 0) by CH₄, CO, CO_2,H₂O, O₂, N₂, Ar, and NO (X²∏) measured behind reproducible shock waves at temperatures in the range 1400 to 2300 K. High-temperature quenching cross-sections for CH₄, Ar, O₂, and NO (X²∏) are similar to those measured at room temperature. Cross-sections for H₂O and CO₂decrease, while those for N₂ and CO increase with temperature. Modeling based on an ion-pair intermediate for the collision quantitatively predicts quenching rates for all reactant and product species in combustion environments.

© 1992 Optical Society of America