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Published on: May 9, 2014
Calibration of a scintillation dosemeter for beta rays using an extrapolation ionization chamber
A T Hakanen1, P M Sipilä, A Kosunen
1Radiation Metrology Laboratory, Radiation and Nuclear Safety Authority, P.O. Box 14, FIN-00881 Helsinki, Finland. arvi.hakanen@stuk.fi
Abstract:
A scintillation dosemeter is calibrated for 90Sr/90Y beta rays from an ophthalmic applicator, using an extrapolation ionization chamber as a reference instrument. The calibration factor for the scintillation dosemeter agrees with that given by the manufacturer of the dosemeter within ca. 2%. The estimated overall uncertainty of the present calibration is ca. 6% (2 sd). A calibrated beta-ray ophthalmic applicator can be used as a reference source for further calibrations performed in the laboratory or in the hospital.
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