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Related Experiment Videos

Performance test of PDM-101 electronic pocket dosimeters using a 60Co source

T Kawano1, H Ebihara

  • 1Radioisotope Center, University of Tsukuba, Ibaraki, Japan.

Health Physics
|September 1, 1993
PubMed
Summary

Performance tests of the PDM-101 silicon semiconductor dosimeter show it accurately measures dose equivalents above 0.08 microSv. Below this threshold, accuracy decreases, but directional and symmetric responses remain within 10% tolerance.

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Area of Science:

  • Radiation detection and measurement
  • Solid-state physics
  • Nuclear instrumentation

Background:

  • Silicon semiconductor dosimeters are crucial for radiation monitoring.
  • Accurate dose equivalent measurement is vital for radiation safety.
  • Understanding dosimeter performance across different dose ranges is essential.

Purpose of the Study:

  • To evaluate the performance of the PDM-101 silicon semiconductor dosimeter.
  • To assess the dosimeter's accuracy in measuring dose equivalents from a 60Co source.
  • To determine the dosimeter's response characteristics, including directional sensitivity and background noise.

Main Methods:

  • Performance testing of the PDM-101 dosimeter using a 60Co point source (approx. 500 kBq).
  • Measurement of dose equivalents and dose equivalent rates.

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  • Analysis of dosimeter response for directional exposures (front, back, and 31 directions).
  • Determination of background and noise levels.

    • Main Results:

    • The PDM-101 dosimeter responds to dose equivalents as low as 0.02 microSv, with significant error below 0.08 microSv.
    • Accuracy for measured dose equivalents and rates exceeded 90% for values >= 0.08 microSv.
    • Directional and symmetric responses (front/back) were within a 10% tolerance.
    • Background and noise levels were measured at 0.092 +/- 0.005 microSv h-1.

    Conclusions:

    • The PDM-101 silicon semiconductor dosimeter demonstrates reliable performance for dose equivalents >= 0.08 microSv.
    • The dosimeter exhibits good directional and symmetric response characteristics within acceptable tolerances.
    • Further investigation may be needed for precise measurements below 0.08 microSv.