Infrared Spectrum and Dipole Moment Function of Lithium Hydride

Abstract

Line intensities in the 0–1 and 1–2 rotation-vibration bands of lithium hydride at 7 μ have been measured. The ratio of the dipole moment to the dipole derivative is ue/(∂u/∂r)re re=1.8±0.3. It is shown that the dipole moment of a diatomic molecule approaches the united atom limit as the third power of the internuclear separation.