Quantitative analysis of time-resolved infrared stimulated luminescence in feldspars

Vasilis Pagonis, Christina Ankjærgaard, Mayank Jain, Makaiko L. Chithambo

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    Abstract

    Time-resolved infrared-stimulated luminescence (TR-IRSL) from feldspar samples is of importance in the field of luminescence dating, since it provides information on the luminescence mechanism in these materials. In this paper we present new analytical equations which can be used to analyze TR-IRSL signals, both during and after short infrared stimulation pulses. The equations are developed using a recently proposed kinetic model, which describes localized electronic recombination via tunneling between trapped electrons and recombination centers in luminescent materials. Recombination is assumed to take place from the excited state of the trapped electron to the nearest-neighbor center within a random distribution of luminescence recombination centers. Different possibilities are examined within the model, depending on the relative importance of electron de-excitation and recombination. The equations are applied to experimental TR-IRSL data of natural feldspars, and good agreement is found between experimental and modeling results.
    Original languageEnglish
    JournalPhysica B: Condensed Matter
    Volume497
    Pages (from-to)78-85
    Number of pages8
    ISSN0921-4526
    DOIs
    Publication statusPublished - 2016

    Keywords

    • Feldspars
    • Stimulated luminescence emission
    • Time-resolved experiments
    • Tunneling

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