LINE-SHAPES IN THE ROTATIONAL SPECTRA OF HF IN AR GAS - NEW EXPERIMENTAL-DATA AND CALCULATIONS OF LINE INTERFERENCE

The absorption spectra of HF-Ar mixtures have been registered in the s pectral range of 30-410 cm(-1). The line asymmetry has been detected. The widths, shifts and asymmetry parameters for lines R(0)-R(9) have b een obtained. The data are compared with the recently calculated lines hape parameters by Green and Hutson. The 20% discrepancy of the experi mental and calculated width cross-sections is observed. The agreement of the experimental and calculated shift cross-sections is satisfactor y for the lines at lower frequency but is rather poor for the lines at higher frequency. The observed line asymmetry is explained by the lin e mixing effect in the framework of semiclassical approach.