COLLISION BROADENED HCl LINE WIDTHS MEASURED ON A HIGH RESOLUTION INTERFEROMETER

Author Institution: Department of Physics, The Ohio State UniversitySome initial results from a continuing program to measure the collision broadened line widths in HX-noble gas mixtures will be presented. These measurements are being made on the pure rotational HX transitions using a high resolution interferometer. Retrieval of absolute half widths and foreign gas broadening parameters from data on HX-foreign gas mixtures has long been hampered by the experimental problem of accurately determining the partial pressure of HX in the mixture. Our interferometer, designed to accommodate the same gas cell in either the symmetric or asymmetric mode, makes it possible to calculate the partial pressure of HX in each gas sample from the dispersion curve obtained for that sample in asymmetric operation