Abstract
The fluorescence of silicate phosphors is discussed on the basis of a potential energy curve model and it is shown that Gaussian distributions of the energy bands in excitation and emission spectra can be expected from this model. The model is applied to manganese activated phosphors and an attempt is made to explain the long decay time of these phosphors. Lead activated silicates are discussed and reasons for assuming divalent lead to be the activator are brought out.The mechanism of sensitized luminescence is treated briefly in terms of the model, as well as the ways in which radiationless energy dissipation may take place.
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