Where semiclassical radiation theory fails

Semiclassical radiation theory provides parallel derivations of spontaneous emission and of spontaneous incoherent scattering of radiation. In the latter case, in constrast to the former, the theory is in clear disagreement with established experimental data since it predicts equal intensity for Stokes and anti-Stokes lines in Raman scattering. A new postulate of semiquantization is proposed to restore agreement with experiment without quantizing the electromagnetic field. © 1971 The American Physical Society.