Fourkas JT, Brewer TR, Kim H, Fayer MD. Picosecond time-resolved four-wave mixing experiments in sodium-seeded flames.
Opt Lett 1991;
16:177-179. [PMID:
19773874 DOI:
10.1364/ol.16.000177]
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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.
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