LUMINESCENCE QUENCHING OF STRONGLY COUPLED SYSTEMS

The case of temperature quenching of luminescence of broad-band emitte rs is examined. On the basis of published and newly acquired data, it is concluded that the theory of nonradiative transitions based on coup ling to a single vibrational mode, whether calculated in the Mott-Seit z terms or improved by the procedures developed by Struck and Fonger, is totally incapable of accounting for observed radiationless rates. T here is no evidence for the operation of selection rules for nonradiat ive transitions.