Variation avec la température des coefficients d'élargissement des raies de l'ozone par l'oxygène et l'air pour la bande ν1 + ν 3

Abstract

Nous avons enregistré les spectres de O3 élargis par O 2 et par l'air sec dans la région de 5 μm, à des températures variant de 296 K à 171 K. Nous en déduisons la valeur des coefficients d'élargissement à ces diverses températures. Ecrivant que αL0( T) = αL0(T0)·(T0/T) n nous en déduisons n = 1,3 ± 0,2 pour l'air

Temperature Dependence of Air-Broadening and Shift Coefficients of O3Lines in the ν1Band

“…The line-by-line comparison also shows 7,[13][14][15][16]25), and found them to be consistent with the band (10,12,19,22,25,26) all indicate that the N 2 -broadening coefficient is usually about 3% larger than the air-broadresults of the present study in the B-type n 1 band. Because of the lack of temperature-dependent air-broadening mea-ening value for the same line.…”

Relaxation and Lineshape of the 500.4-GHz Line of Ozone Perturbed by N2 and O2

“…The scattering of reported values, in the range 0.644(42)-0.822(59) (one standard deviation is given in parentheses), does not allow a general trend determination of the n parameter. The present results can be compared to the experimental mean values reported by Smith et al (13,14) from studies in the 1 and 2 bands involving all type of transitions: n ϭ 0.67 (7) and n ϭ 0.53 (8), respectively. Barbe et al (15) reported the value n ϭ 0.72(4) for both N 2 -and O 2 -induced broadening, determined from measurements on 35 lines in the 1 ϩ 3 band.…”

Temperature Dependence of N2and O2Broadening Coefficients of Ozone

“…Here we take great care to derive these coef-perform a nonlinear least squares fit between calculated and observed transmittances, as explained in Ref. (24 (17) may be explained here: The probe of temperature was not directly in the gas, but was in the matter of the cryostat, cooled by liquid N 2 flow, leading to a real lower temperature of the gas mixture than used for n retrieval. Also, the spectrometer resolution was 0.020 cm 01 , on the order of total widths of lines, when foreign gas pressure around 100 Torr is used, so that the accuracy on halfwidth was lower.…”