Picosecond time-resolved four-wave mixing experiments in sodium-seeded flames.
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.
J T
JT
Fourkas
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TR
Brewer
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H
Kim
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Fayer