Instrumentation for the non-destructive optical measurement of trapped electrons in feldspar

M. Kook*, R. Kumar, A.S. Murray, K.J. Thomsen, M. Jain

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    A facility for the measurement of infrared photoluminescence (IRPL) has been developed for the Risø TL/OSL reader. The new IRPL measurement system uses an external laser light source at 1.49 eV (830 nm) and two photomultiplier tubes (PMT) for detecting emissions at ∼1.41 eV (880 nm) and ∼1.3 eV (955 nm) and an EMCCD. Pulsed IRPL measurement ensures a low background count rate by allowing the rejection of breakthrough from excitation light. We present the results of integrated IRPL measurements on both multiple- and single-grain aliquots, and finally demonstrate the potential of imaging natural K-feldspar samples and a granite rock slice.
    Original languageEnglish
    JournalRadiation Measurements
    Volume120
    Pages (from-to)247-252
    ISSN1350-4487
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Feldspar
    • Imaging
    • Infrared photoluminescence (IRPL)
    • Optical dating
    • Single grain

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