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Radiat Prot Dosimetry. 2016 Sep;170(1-4):208-12. doi: 10.1093/rpd/ncw104. Epub 2016 May 3.

ENERGY AND ANGULAR DEPENDENCE OF RADIOPHOTOLUMINESCENT GLASS DOSEMETERS FOR EYE LENS DOSIMETRY.

Author information

1
Belgian Nuclear Research Centre (SCK-CEN), Boeretang 200, 2400 Mol, Belgium Vrije Universiteit Brussel (VUB), LABO and BEFY, Laarbeeklaan 103, 1090 Brussels, Belgium CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil ehdsilva@sckcen.be.
2
Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia.
3
Belgian Nuclear Research Centre (SCK-CEN), Boeretang 200, 2400 Mol, Belgium.
4
Vrije Universiteit Brussel (VUB), LABO and BEFY, Laarbeeklaan 103, 1090 Brussels, Belgium Department of Radiation Protection (VUB), Laarbeeklaan 103, 1090 Brussels, Belgium.
5
Oarai Research Center, Chiyoda Technol Corporation, 3681 Naritacho, Oarai-machi, Higashiibaraki-gun, Ibaraki 311-1313, Japan.
6
Vrije Universiteit Brussel (VUB), LABO and BEFY, Laarbeeklaan 103, 1090 Brussels, Belgium Department of Radiology, UZ Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium.

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.

PMID:
27143793
DOI:
10.1093/rpd/ncw104
[Indexed for MEDLINE]

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