Etude à basse température des largeurs et des déplacements des raies rovibrationnelles de la bande fondamentale de H35Cl comprimé par N2, O2, D2 et H2

Abstract

Linewidths and shifts in the spectrum (v0→1 band) of H35Cl perturbed by N2, O2, D2, and H2 have been measured for different temperatures (at 298 and 163 K). The Sisam spectrometer resolution was 0.024 cm−1. The Anderson–Tsao–Curnutte theory has been applied to the linewidth calculations. For perturbation by N2 and O2, this approach is justified by the intensity of electrostatic interactions, and it leads to a satisfactory agreement with experiment, at least for lines of low rotational quantum number. On the other hand, the low value of H2 and D2 quadrupole leads to values of the optical diameter close to the kinetic diameter. A discussion shows then that a more realistic approach is needed in that case.[Journal translation]