A crossed molecular beam study of NO+O3 --> NO*2 +O2: The effect of ozone rotational energy
Abstract
The chemiluminescent branch of the reaction between NO and O3 to produce NO*2 and O2 was studied by crossing a supersonic NO beam with a variable temperature effusive O3 beam and monitoring visible light emission. Signal was measured for two ozone beam source temperatures, 300 and 181 K, and a ratio of S300/S181=3.0±0.4 was obtained. This ratio represents the effect of changing translational energy as well as internal O3 energy. The translational energy contribution to the signal ratio was calculated using a collision energy dependence of σ ∝ (E/2.3-1)2.05, which was derived from experiments in which the temperature of the supersonic NO source was varied. The effect of vibrational energy was accounted for using published rate constant ratios. The remaining signal ratio of 2.3±0.3 is attributed to the effect of ozone rotational energy, which results in a dependence of (Erot)n where n=1.3-1.8.
- Publication:
-
Journal of Chemical Physics
- Pub Date:
- April 1984
- DOI:
- 10.1063/1.447186
- Bibcode:
- 1984JChPh..80.3644K