Reçu le 22 juillet 1980, revise le 12 septembre, accepte le 10 octobre 1980) Résumé. 2014 On présente une étude en spectrométrie par transformée de Fourier de la raie de rotation pure J = 0-1 de HF à 41 cm-1, perturbée par l'argon et par CO2. Par régression non linéaire, on détermine les paramètres du profil de Lorentz corrigé, en tenant compte à la fois du terme de population et de l'influence des raies voisines. Ce profil reproduit correctement celui de la raie expérimentale. Abstract. 2014 Using Fourier Transform spectroscopy, we study the rotational line J = 0-1 of HF (at 41 cm-1)
A (sub)millimetric source is obtained by difference-frequency mixing in a nonlinear crystal. It allows investigation of spectral absorption between 4 and 40 cm−1 with a new two-beam spectroscopic mounting. The complete mounting is described. The measurement method is given in detail. Compressed gaseous nitrogen-induced absorption measurements are used to calculate relaxation times and spectral moments. Comparisons are made with other measurements in close frequency regions, and theoretical models and an empirical line-shape model.
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