Picosecond time-resolved four-wave mixing experiments in sodium-seeded flames
- 1 February 1991
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 16 (3) , 177-179
- https://doi.org/10.1364/ol.16.000177
Abstract
Picosecond four-wave mixing experiments have been used to study collisions in a Na-seeded, premixed, methane–air flame. Population gratings are used to measure Na excited-state quenching collision rates, while polarization gratings are used to measure Na ground-state hyperfine coherence randomizing collision rates and overall Na diffusion rates, even though these processes are slower than the excited-state quenching rate.Keywords
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