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

The CN (A 2I-Ii) and (X 2Z+) vibrational distributions from the C + N20 -’ CN +NO reaction at 300 K were determined in a low pressure flow reactor. From the chemiluminescence A 2IIi -X 2E+ the vibrational distribution of A 21] was found to peak at v’= 1. From the laser induced fluorescence B 2+ __ X 2E+, the vibrational distribution of X 2E+ was found to peak at v"= 4. A CEHE--N220 combustion flame, stabilized at 2.8 tort with a temperature of 2500 K, gave a CN (A IIi) vibrational distribution peaking at v’= 2 which can be attributed to the C + N20 reaction at 2500 K. However the CN ground state vibrational distribution was found to be relaxed.