Abstract
A vibronic theory of the Raman effect is developed within a semiclassical framework which provides explicit expressions for the symmetric and antisymmetric components of both the real and imaginary parts of the vibrational Raman transition tensor. The antisymmetric component of the real part is shown to originate in vibronic coupling and to vanish completely at transparent frequencies. Dispersion and absorption lineshape functions are introduced, and by allowing for interference between the α and β electronic absorption bands in ferrocytochrome c, excitation profiles are derived for symmetric and antisymmetric resonance Raman scattering in this region which agree well with observation.
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