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et al.. Radiotherapy out-of-field dosimetry: Experimental and computational results for photons in a water tank. Radiation Measurements, Elsevier, 2013, 57, pp.Radiotherapy out-of-field dosimetry: Experimental and computational results for photons in a water tank, Radiation Measurements (2013), Highlights: Dosimeters based on OSL, TLD and RPL have been compared for radiotherapy purposes.  Irradiations have been performed in a water phantom located in and out of the beam.  Doses have been studied for three radiation quantities, 6, 12 and 20 MV.  Water and collimator scatter and leakage doses out of the beam have been evaluated.

The LNE-LNHB has developed two primary standards to determine the absorbed dose to water under reference conditions (for 10 cm × 10 cm) in 60 Co, 6 MV, 12 MV and 20 MV photon beams: a new graphite calorimeter and a water calorimeter. This first paper presents the results obtained with the graphite calorimeter and the new associated methodology. The associated relative standard uncertainty (k = 1) of absorbed dose to water is 0.25% for 60 Co and lies between 0.32% to 0.35% for MV x-ray beams.