NPL operates a mailed alanine reference dosimetry service for 60Co γ-ray and megavoltage photon beams. A phantom set enables the small alanine dosimeters to be irradiated alongside ionisation chambers in radiotherapy photon beams. On return to NPL, the dose received by the alanine is determined by measuring the concentration of stable free radicals using electron paramagnetic resonance spectrometry.
We can provide a variety of holders and phantoms in which to place the alanine pellets. Our service is complemented by a team of experienced dosimetry specialists providing expert advice to help you achieve maximum accuracy with your dose measurements.
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