The 2A1(K′ = 1) - 2B1(K″ = 0) Douglas-Huber band of NO2 at 455 nm has been experimentally studied at room temperature at low pressure (0.1 mbar) and in an atmospheric pressure Bunsen flame with degenerate four-wave mixing (DFWM) and polarization spectroscopy (PS). In the low pressure limit, comparison between the spectra recorded with DFWM and PS both in the alignment and orientation configuration made it possible to discriminate the structure of composite spectral features. Measurements on a Bunsen flame indicate that unsaturated PS is a more promising technique than saturated DFWM when detection of NO2 at trace levels in targets with complex thermodynamic evolution is required.
|Pages (from-to)||282 - 285|
|Number of pages||4|
|Publication status||Published - Feb 2003|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Industrial and Manufacturing Engineering