Spectroscopic analysis reveals electron transfer transitions underlying 4750 Å emission in KCl:Tl crystals, indicating the mechanisms driving thermoluminescence and phosphorescence.
Evidence is presented for the occurrence of electron transfer transitions in KCl:Tl, the return to the unexcited state producing the previously observed but unexplained 4750 Å emission. Recognition of this electron transfer process leads to an explanation of KCl:Tl thermoluminescence, and a tentative explanation of phosphorescence.
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J. E. A. Alderson (1964) studied this question.
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