Abstract
There are two formulars for the Luminescence as function of activatorconcentration (Johnson-Williams and Ewles-Lee). From this paper it is possible to calculate the parameters in both formulas for very little activatorconcentration direct in a diagram log Intensity versus log concentration. Our calculation leads to a straight line with the slope 1 and the one parameter follows from extrapolation toc=1. The second parameter is available from the maximum of the curve.
On the other hand our calculation allows to decide between both formulas. In the region for great values of concentration the equation of Ewles-Lee gives another straight line for log Intensity versus concentration.
Experiments from von Uitert and Soden on CaWO4 activated with rare earth ions confirm our method.
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Buhrow, J. Parameterberechnung für die Konzentrationsabhängigkeit der Fluoreszenz in nichtphotoleitenden Kristallinen Leuchtstoffen. Czech J Phys 13, 161–164 (1963). https://doi.org/10.1007/BF01699286
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DOI: https://doi.org/10.1007/BF01699286