Collisional Raman linewidths of nitrogen at high temperature (1700-2400 K).
New high-temperature measurements of collisional linewidths of the Raman Q branch of nitrogen have been performed at 1700-2400 K with stimulated Raman spectroscopy in a tungsten filament. We fitted these data together with previous data obtained in the 295-1500-K range to redetermine the parameters of the relaxation models used in coherent anti-Stokes Raman spectroscopy thermometry. The improvement in the accuracy of the temperature measurement has been checked. Semiclassical calculations of linewidths in the 1700-2400-K range agree with the experimental data and have been extended to even higher temperatures.
B
B
Lavorel
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L
Guillot
J
J
Bonamy
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D
Robert