Collisional Raman Linewidths of Nitrogen at High-Temperature (1700-2400 K)

B. Lavorel (1) , L. Guillot (1) , J. Bonamy (2) , D. Robert (2)

1 LPUB - Laboratoire de Physique de l'Université de Bourgogne
2 LPM - Laboratoire de Physique Moléculaire (UMR 6624)

New high-temperature measurements of collisional linewidths of the Roman 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.

Mots clés: ROTATIONALLY INELASTIC RATES; Q-BRANCH; THEORETICAL-ANALYSIS; SPECTROSCOPY; N-2; SPECTRA; CO

B. Lavorel, L. Guillot, J. Bonamy, D. Robert. Collisional Raman Linewidths of Nitrogen at High-Temperature (1700-2400 K). Optics Letters, 1995, 20 (10), pp.1189-1191. ⟨hal-00399123⟩