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High-level gamma-ray dosimetry using common TLD phosphors.

A R Lakshmanan, R C Bhatt

    Physics in Medicine and Biology
    |November 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

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    This study investigates thermoluminescence in common TLD phosphors for high-level gamma dose measurements. It analyzes UV-induced effects, damage, and optical changes in CaSO4:Tm, CaSO4:Dy, LiF, and Li2B4O7 materials.

    Area of Science:

    • Solid State Physics
    • Radiation Dosimetry
    • Luminescence

    Background:

    • Thermoluminescence (TL) is a key phenomenon for radiation dosimetry.
    • Accurate measurement of high-level gamma doses is crucial in various applications.
    • Understanding phosphor behavior under high radiation is essential for reliable dosimetry.

    Purpose of the Study:

    • To evaluate the thermoluminescence properties of common TLD phosphors for high gamma dose measurements.
    • To investigate the impact of ultraviolet (UV) radiation on TL and phosphorescence.
    • To assess radiation-induced damage and optical density changes in selected TLD materials.

    Main Methods:

    • Studied high-temperature peaks in thermoluminescence.
    • Investigated UV (253.7 nm) induced thermoluminescence and phosphorescence.

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  • Analyzed damage effects and optical density changes.
  • Utilized common TLD phosphors: CaSO4 : Tm, CaSO4 : Dy, LiF TLD-100, and Li2B4O7 : Mn.

    • Main Results:

    • Characterized thermoluminescent responses of selected phosphors to high gamma doses (10^2–10^6 Gy).
    • Observed effects of UV radiation on TL and phosphorescence properties.
    • Quantified radiation damage and optical density alterations in the TLD materials.

    Conclusions:

    • The studied TLD phosphors exhibit potential for measuring high-level gamma doses.
    • UV-induced effects and radiation damage need consideration for accurate dosimetry.
    • Further research can optimize these phosphors for specific high-dose applications.