Abstract
Solid state pellets (1 mm thick) for electron spin resonance (ESR) dosimetrywere made using ammonium tartrate as the radiation-sensitive substance. Theirbehaviour was experimentally investigated as a function of dose with 60Cogamma rays. The calibration function obtained permits measurements of absorbeddose in the 2-50 Gy range, with a combined uncertainty of ±4%. Thelowest detectable dose was about 0.5 Gy. These properties are comparable withor even better than those of ESR dosimeters made from other materials. Thetime stability of the ESR signal of ammonium tartrate dosimeters at differentstorage conditions after irradiation was studied. A rather complex behaviourwas observed, which suggests that more species of free radicals are producedby radiation and that migration processes may be effective. No dependence ofthe response on beam quality was found for high-energy photon and electronbeams produced by a linear accelerator used in radiotherapy, whereas dosewas underestimated with low-energy x-rays.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call