Vibrational relaxation in HBr and HCl from 144°K to 584°K

Abstract
A laser fluorescence technique was used to measure the vibrational relaxation rates of HBr(ν = 1) by HBr and HCl(ν = 1) by HCl between 144 and 584°K. A deep minimum in the relaxation probability was found near 300°K in both cases and is attributed to the effects of strong attractive interactions at low temperatures.