Determination of Vibrational Energy Distributions of CN (A 2Πi) and (X Σ2⁺) from the C+N₂O Reaction by Chemiluminescence and Laser Induced Fluorescence

Abstract

The CN (A 2Πi) and (X Σ2⁺) vibrational distributions from the C+N2O→CN+NO reaction at 300 K were determined in a low pressure flow reactor. From the chemiluminescence A 2Πi→X Σ2⁺ the vibrational distribution of A 2Πi was found to peak at υ′ = 1. From the laser induced fluorescence B Σ2⁺→X Σ2⁺, the vibrational distribution of X Σ2⁺ was found to peak at υ″ = 4.A C₂H₂—N₂O combustion flame, stabilized at 2.8 torr with a temperature of 2500 K, gave a CN (A 2Πi) vibrational distribution peaking at υ′ = 2 which can be attributed to the C+N₂O reaction at 2500 K. However the CN ground state vibrational distribution was found to be relaxed.