Abstract
The vibrational relaxation times of DF(v = 1) in the presence of H2 have been measured in a combined shock tube laser‐induced fluorescence experiment at temperatures from 440 to 690°K and 295°K. The data fall along an extrapolation of previously obtained high temperature shock tube data. Data are presented also for the relaxation of HF(v = 1) by H2 and DF(v = 1) by D2.