APPLICATION OF TIME-RESOLVED RESONANCE RAMAN-SPECTROSCOPY TO THE STUDY OF RAPID INTRA-MOLECULAR RADIATIONLESS TRANSITIONS

It is shown that the decay rate γ2 of the excited state of a molecule can be determined by measuring the decrease of the resonance Raman intensity on a time scale much longer than γ-12, provided that the time needed for repopulation of the ground state, following rapid intramolecular radiationless transitions from the excited state to a molecular quasicontinuum, is itself much longer than γ-12. Thus, it should be possible to avoid the use of ultrashort pulses in the study of very fast intramolecular decay process. © 1979.