Observation of CH A→X, CN B→X, and NH A→X emissions in gas-phase collisions of fast O(3P) atoms with hydrazines

Optical emissions in single-collision reactions of fast (20 eV laboratory translational energy) O(3P) atoms with hydrazine, methylhydrazine, and 1,1-dimethylhydrazine have been measured in a crossed-beams geometry. The emissions were observed in the wavelength range 325–440 nm, and were identified as the CH (A 2Δ→X 2Πr) (for methylhydrazine), CN (B 2Σ+→X 2Σ+) (for methylhydrazine), and NH (A 3Π→X 3Σ−) transitions (for all three hydrazines). The experimental vibration-rotation bands were fit to a synthetic spectrum of CH, CN, and NH with given vibrational and rotational temperatures.