Line Intensities in the Raman Effect of 1Σ Diatomic Molecules

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Abstract
The effect of rotation‐vibration interaction on line intensities in the Raman effect is examined. Both the rotation‐vibration and pure rotation spectra are discussed. It is shown that from a study of relative line intensities one can obtain the quantities β0/β1re and κ12/β12, where β0 and β1 are the first two terms in the expansion of the anisotropy of the polarizability about the equilibrium internuclear distance re, and κ1 is the derivative with respect to internuclear distance of the spherical part of the polarizability. The treatment considers only the case of a harmonic oscillator and is carried through to terms of order γ2, where γ = 2Be/ωe.