Short-time wave-packet dynamics and the reflection principle of continuum resonance Raman scattering

We use the time-dependent approach to calculate cross sections for continum resonance Raman scattering to derive the Raman reflection principle. The essential step in the derivation is to use a short-time approximation to the quantum mechanical propagators. Raman scattering from a diatomic molecule serves as an example to compare our approximate treatment with numerically exact results and a comparable formula derived by Lee [Chem. Phys. Lett. 203 (1993) 93].