Infrared bleaching of the thermoluminescence of four feldspars

G. A.T. Duller*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

This paper studies the effect upon the thermotuminescence (TL) signal of four feldspar samples of exposing them to infrared stimulation, as occurs during infrared-stimulated luminescence (irsl) measurement. Together with pulse annealing measurements these results are used to show which part of the tl signal is removed by exposure to ir and which part is directly related to the irsl signal that is observed. When the samples are preheated prior to measurement In order to remove any low-temperature (< 200 °C) tl signals, a linear relationship is observed between the amount of tl that is lost and the irsl light sum that is produced. The irsl light sum is consistently four times larger than the amount of tl that Is lost. Three possible explanations are proposed for this, but no conclusive evidence could be obtained to support any of them. A close similarity is observed in the pulse annealing results and the loss of tl due to ir exposure of the four samples. This is taken as evidence that under ir stimulation a similar trap, or trap complex, provides the charge donor in all of the feldspar samples studied here in spite of the variability in the tl signals observed.

Original languageEnglish
Pages (from-to)1244-1258
Number of pages15
JournalJournal of Physics D: Applied Physics
Volume28
Issue number6
DOIs
Publication statusPublished - 14 Jun 1995

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