Photodissociation of oxygen molecules at 226 nm in the Herzberg I system
Abstract
Doppler profiles of O(2p 3Pj) (j=2,1,0) produced from the photodissociation of O2 in the Herzberg I system (A3Σ+u←X3Σ-g) at 226 nm are measured with a resonance-enhanced multiphoton ionization technique. The anisotropy parameter for the angular distribution of the photofragments is found to be 1.6±0.4, in quantitative agreement with theory and indicating that the Herzberg I system borrows most of its intensity from a parallel band. The branching ratios to the j levels of O(2p 3Pj) (j=2,1,0) are found to be (2.5±0.3):1:(0.26±0.03) and are compared with the values expected for the limits of adiabatic and diabatic dissociation.
- Publication:
-
Journal of Chemical Physics
- Pub Date:
- September 1991
- DOI:
- 10.1063/1.461779
- Bibcode:
- 1991JChPh..95.3394T
- Keywords:
-
- Herzberg Bands;
- Molecular Spectra;
- Oxygen Spectra;
- Photodissociation;
- Absorption Cross Sections;
- Angular Distribution;
- Multiphoton Absorption;
- Resonance Charge Exchange;
- Schumann-Runge Bands;
- Atomic and Molecular Physics