热释光
磷光
荧光粉
彭宁离子阱
电子
原子物理学
亚稳态
存水弯(水管)
分析化学(期刊)
杂质
持续发光
材料科学
化学
大气温度范围
发光
荧光
物理
光电子学
热力学
光学
环境化学
核物理学
有机化学
气象学
作者
J. T. Randall,M. H. F. Wilkins
出处
期刊:Proceedings of the Royal Society of London
[The Royal Society]
日期:1945-11-06
卷期号:184 (999): 365-389
被引量:501
标识
DOI:10.1098/rspa.1945.0024
摘要
The fundamental connexion between thermoluminescence, phosphorescence and electron traps in solids has been investigated. Thermoluminescence and long-period phosphorescence arise from the release of electrons from metastable levels or traps. By studying the thermal stability of trapped electrons and the probability of release from traps of different depths, methods have been developed for finding the depths of electron traps in phosphors. The main experiment consists in exciting the phosphor at low temperatures until all the traps are filled; the phosphor is then warmed at a steady rate and the light emitted while warming is measured as a function of the temperature. The results show that the trap distribution in impurity phosphors such as willemite and the alkaline earth sulphides are, in general, complex, and extend over a range often as wide as 0·2-1·0 eV. The probability of release of an electron from a trap of depth E at temperature T is of the form se -E/kT , where is a constant. Values of s for alkaline earth and zinc sulphides are in the neighbourhood of 10 8 ±1 sec. -1 .
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