Infrared spectral moments and mean squared torques of OCS mixed with noble gases

摘要

The spectral moments of OCS mixed with rare gases are measured for the ngr;1and ngr;2vibrations at various pressures in the 5ndash;300 bar range. Hot bands, isotopic bands, and rotationndash;vibration interaction are taken into account for the two vibrations. The corrected experimental values of the second moments are in excellent agreement with the theoretical ones. The mean squared torques are therefore deduced, and an estimation of the experimental error is made. We obtain the same values of the mean squared torques from the ngr;1and ngr;2vibrations and they are found to be a linear function of density. An interpretation in terms of the intermolecular potential is given.