Pressure Effect of Noble Gases on the Pure Rotational Spectrum of Hydrogen Chloride

Abstract
The changes of the pure rotational spectrum of HCl in the region 15–170 cm−1 under the influence of compression with helium and argon up to 100 atm have been investigated. The experimental results are compared with the spectra calculated on the basis of correlation theory. Energy and momentum transfer in collisions of short duration give full account of the observed features.