Forme et structures fines de la bande induite par la pression dans la bande fondamentale de vibration-rotation des molécules HF, HCl et HBr

Abstract

Experimental results are given for the band induced by foreign gas pressure in the fundamental vibration—rotation spectrum of the molecules HF, HCl and HBr. The induced band is observed at relatively low foreign gas densities (less than two Amagats in most cases). In certain cases the band contains two or more components. The intensity of the band induced by argon has been measured at different temperatures as a function of foreign gas density. The behaviour of the band with temperature has been studied and it is shown, in particular, that with certain foreign gases the induced band remains, visible at temperatures sufficiently low that the normal vibration—rotation structures of the active molecule have disappeared.