Pressure broadening and shift of transitions of the first overtone of HCl

High-resolution spectroscopic measurements were made using distributed feedback diode lasers. We measured line strength and pressure-induced broadening and shift for two lines, R(3) and P(4), of the first overtone (2<-0) rovibrational band, for the two isotopomers H35Cl and H37Cl, according to their natural abundances; measurements were also made in the presence of foreign gases. Comparison was made with available data when possible