Helium-induced broadening and shifting in the first overtone of hydrogen fluoride

Abstract

Spectra of HF mixtures with helium were recorded at elevated pressures ranging from 1 to 11 atm at 297.8(2) K. The rovibrational lines in the first overtone band were fitted with Voigt and Rautian profiles. The broadening and shifting coefficients for 19 lines in the first overtone are reported. An estimate for the velocity changing shifting coefficients for 11 lines is obtained. To the best of our knowledge, most of the reported line parameters are novel. Herman–Wallis coefficients were determined from the line intensity distribution as well.