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Radiation dosimetry by a new solid-state effect.

E B Podgorsak, P R Moran

    Science (New York, N.Y.)
    |January 26, 1973
    PubMed
    Summary
    This summary is machine-generated.

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    Radiation-induced thermally activated depolarization (RITAD) in solids offers a highly sensitive method for radiation detection. This technique shows significant advantages over thermoluminescence for solid-state dosimetry applications.

    Area of Science:

    • Solid-state physics
    • Radiation detection
    • Materials science

    Background:

    • Ionizing radiation induces electrical polarization in dielectric solids.
    • Radiation-induced thermally activated depolarization (RITAD) is a distinct phenomenon from radioelectret effects.
    • Calcium fluoride (CaF2) is a relevant dielectric material for studying these effects.

    Purpose of the Study:

    • To investigate and characterize radiation-induced thermally activated depolarization (RITAD) phenomena in dielectric solids.
    • To compare the efficacy of RITAD signals with thermoluminescence (TL) signals for radiation detection.
    • To assess the potential of RITAD for solid-state dosimetry.

    Main Methods:

    • Experimental measurement of RITAD signals in nominally pure calcium fluoride samples.

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  • Simultaneous measurement of thermoluminescence (TL) signals under identical experimental conditions.
  • Analysis of signal-to-noise power ratios for both RITAD and TL.

    • Main Results:

    • RITAD signals in CaF2 exhibited a 40-decibel signal-to-noise power advantage over TL signals.
    • The RITAD phenomena demonstrate very high sensitivity to ionizing radiation.
    • Sample fabrication for RITAD measurements is straightforward.

    Conclusions:

    • RITAD is a promising phenomenon for solid-state dosimetry due to its high sensitivity and signal quality.
    • RITAD offers a significant improvement over traditional thermoluminescence dosimetry.
    • The ease of measurement and fabrication further supports RITAD's potential as a novel dosimetry technique.