Abstract
Recent studies demonstrated that lens opacities can occur at lower radiation doses than previously accepted. In view of these
studies, the International Commission of Radiological Protection recommended in 2011 to reduce the eye lens dose limit from
150 mSv/y to 20 mSv/y. This implies in the need of monitoring doses received by the eye lenses. In this study, small rod radiophotoluminescent
glass dosemeters (GD-300 series; AGC, Japan) were characterized in terms of their energy (ISO 4037
X-rays narrow spectrum series, S-Cs and S-Co) and angular dependence (0 up to 90 degrees, with 2 ISO energies: N-60 and
S-Cs). All acquisitions were performed at SCK•CEN—Belgium, using the ORAMED proposed cylindrical phantom. For
selected energies (N-60, N-80, N-100, N-120 and N-250), the response of dosemeters irradiated on the ISO water slab phantom,
at the Ruđer Bošković Institute—Croatia, was compared to those irradiated on the cylindrical phantom. GD-300 series
showed good energy dependence, relative to S-Cs, on the cylindrical phantom. From 0 up to 45 degrees, the dosemeters
showed no significant angular dependence, regardless whether they were tested when placed vertically or horizontally on the
cylindrical phantom. However, at higher angles, some angular dependence was observed, mainly when the dosemeters were
irradiated with low-energy photons (N-60). Results showed that GD-300 series have good properties related to Hp(3),
although some improvements may be necessary.
Details
Original language | English |
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Pages (from-to) | 208-212 |
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Journal | Radiation protection dosimetry |
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Volume | 170 |
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Issue number | 1-4 |
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DOIs | |
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Publication status | Published - 3 May 2016 |
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