Etude expérimentale du décalage de la raie d'inversion J = 13, K = 13 de l'ammoniac 14NH3 en fonction de la pression du gaz

By using an open cavity Perot–Fabry type video spectrometer, the variation of line width and line shift of J = 13, K = 13 inversion line of ammonia is studied vs. the pressure p of the gas. The following results are obtained: line width parameter Δv/p = 25 ± 1 MHz/Torr, line shift parameter δv/p = 1.9 ± 0.4 MHz/Torr, collisional diameter be = 13.3 Å.