  We present a calculation of the Hg phonon self-energy for a model of A3C60
(A= K, Rb). The orientational disorder of the C60 molecules is included, and
the lowest order self-energy diagram is considered. The calculations illustrate
that due to the violation of momentum conservation by the orientational
disorder, Raman scattering can measure the decay of a phonon in an
electron-hole pair, allowing the estimate of the electron-phonon coupling from
such experiments. Comparison with experimental line shapes further provides
support for a local correlation of the molecular orientations, with neighboring
molecules preferentially having orientations differing by a 90 degree rotation.
