Abstract
IN the derivation of the decay curve for phosphors of the recombination type with traps at one single depth, Randall and Wilkins1 have assumed that there is no retrapping of electrons. In a subsequent paper2 they show, however, that the cross-sections for electron capture of the traps and the empty luminescence centres are about equal. After a long decay period there are many more empty traps than empty luminescence centres and consequently retrapping must be important.
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References
Randall, J. T., and Wilkins, M. H. F., Proc. Roy. Soc., A., 184, 366 (1945).
Randall, J. T., and Wilkins, M. H. F., Proc. Roy. Soc., A., 184, 390 (1945).
Mott, N. F., and Gurney, R. W., "Electronic Processes", 135 (1940).
de Groot, W., Physica, 6, 275 (1939).
Pringsheim, P., Trans. Faraday Soc., 35, 87 (1939).
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KLASENS, H., WISE, M. Decay of Zinc Sulphide Type Phosphors. Nature 158, 483–484 (1946). https://doi.org/10.1038/158483a0
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DOI: https://doi.org/10.1038/158483a0
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