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INTERCOMPARISON OF EYE LENS DOSEMETERS
1Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany.
Radiation Protection Dosimetry
|March 25, 2016
Summary
Eye lens dosemeters were intercompared for Hp(3) using photon and beta radiation. Hp(0.07) dosemeters significantly over-responded to beta radiation, unlike some Hp(3) dosemeters.
Area of Science:
- Medical Physics
- Radiation Dosimetry
Background:
- Accurate eye lens dosimetry is crucial for radiation protection.
- Previous intercomparisons focused primarily on photon radiation.
Purpose of the Study:
- To intercompare eye lens dosemeters using the Hp(3) quantity.
- To evaluate dosemeter performance with both photon and beta radiation qualities for the first time.
Main Methods:
- Conducted an intercomparison involving three Hp(3) and ten Hp(0.07) dosemeter types.
- Exposed dosemeters to various photon and beta radiation fields, including 85Kr.
- Assessed dosemeter responses against the true Hp(3) dose.
Main Results:
- Hp(0.07) dosemeters calibrated for Hp(3) performed well with photons.
- Hp(0.07) dosemeters showed significant over-response (up to 5000x) to medium-energy beta radiation (85Kr).
- Some Hp(3) dosemeters demonstrated good performance across different radiation types.
Conclusions:
- Hp(0.07) dosemeters are unsuitable for beta radiation fields when Hp(3) is the required quantity.
- Hp(3) dosemeters show better performance for mixed radiation fields relevant to eye lens dosimetry.
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