Far-infrared permanent and induced dipole absorption of diatomic molecules in rare-gas fluids. II. Application to the CO–Ar system

The general theory of far-infrared absorption of diatomic molecules in rare-gas fluids reported in Paper I is applied to the case of the CO–Ar system. The experimental absorption profiles of CO in Ar at three different densities (low-density gas, high-density gas, and liquid) are theoretically reproduced by considering the permanent dipole contribution and the four leading electrostatic multipole-induced dipole contributions. From these results an estimation of the quadrupole, ‖Θ‖, octupole, ‖Ω‖, and hexadecapole, ‖Φ‖, moments of CO is given.