Journal ArticleDOI
Decay of Long Period Afterglow of Alkali Halides under Cathode Ray Excitation
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TLDR
The long period afterglow of pure and activated alkali halides excited with cathode rays has been studied at room and liquid oxygen temperatures as discussed by the authors, and it has been found that the decay follows a power law I t-n between 10 and 100 seconds.Abstract:
The long period afterglow of pure and activated alkali halides excited with cathode rays has been studied at room and liquid oxygen temperatures. It has been found that the decay follows a power law I t-n between 10 and 100 seconds. The value of the power constant n lies in general between 0.7 and 1.1 and is dependent on the exciting intensity. The decay rates are different for different parts of the spectrum. An attempt has been made to explain the results by an extension of the existing theory developed for photoluminescence.read more
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Thermoluminescence of Alkali Halide Phosphors
TL;DR: In this paper, a high rate of heating (5-6 deg sec-1) has been employed to record the thermoluminescence curves of NaCl, KCl, NaCl: Tl, KCL: T l, Kcl: T tl, and mechanical mixtures of TlCl with NaCl and KCl.
Journal ArticleDOI
History of Luminescence from Ancient to Modern Times
TL;DR: The earliest written account of a solid state luminescent material comes from a Chinese text published in the Song dynasty (960-1279 A.D) as mentioned in this paper, where the Buddhist sacred jewel, called "hashi-no-tama" in Japan, is alleged to be self-luminous and to shed a brilliant light on its surroundings.
Journal ArticleDOI
Thermoluminescence of Some Aromatic Hydrocarbons
TL;DR: The thermoluminescence of diphenyl, solid benzene, toluene, and p-xylene has been studied after exciting them with cathode rays at liquid oxygen temperature as discussed by the authors.
References
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Journal ArticleDOI
Phosphorescence and Electron Traps. I. The Study of Trap Distributions
TL;DR: In this article, the authors studied the thermal stability of trapped electrons and the probability of release from traps of different depths, and showed that the trap distribution in impurity phosphors such as willemite and the alkaline earth sulphides are complex and extend over a range often as wide as 0·2-1·0 eV.
Journal ArticleDOI
Electron Traps and Dielectric Changes in Phosphorescent Solids
G. F. J. Garlick,A. F. Gibson +1 more
TL;DR: In this article, it was shown that the dielectric changes occur when electron traps are filled by electrons and the relatively low binding energy of the trapped electron to its trap (from 0.1 to 0.7 eV in most zinc sulphide phosphors) permits large displacements of the electron from its mean position when an external field is applied.