Room-temperature effects of UV radiation in KBr:Eu2+ crystals

R. Pérez-Salas*, R. Meléndrez, R. Aceves, R. Rodriguez, M. Barboza-Flores

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Thermoluminescence and optical absorption measurements have been carried out in KBr:Eu2+ crystals irradiated with monochromatic UV light (200-300 nm) and x-rays at room temperature. For UV- and x-irradiated crystals strong similarities between the thermoluminescence glow curves have been found, suggesting that the low-energy UV radiation produces the same defects as produced by x-irradiation in this material. The thermoluminescence glow curves are composed of six glow peaks located at 337, 383, 403, 435, 475 and 509 K. Thermal annealing experiments in previously irradiated crystals show clearly a correlation between the glow peak located at 383 K and the F-centre thermal bleaching process. Also, the excitation spectrum for each thermoluminescence glow peak has been investigated, showing that the low-energy radiation induces the formation of F centres.

Original languageEnglish
Pages (from-to)4983-4992
Number of pages10
JournalJournal of Physics Condensed Matter
Volume8
Issue number27
DOIs
StatePublished - 1 Jul 1996

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