Electron absorbed dose measurements in LINACs by thermoluminescent dosimeters

• Experimental results of ZrO2 irradiated by high energy electron beam.
• Dosimetric characteristics of CaSO4:Dy were obtained under high energy electron effect.
• Absorbed dose in electron beam was determined by TL phosphors.
• Absorbed dose could be measured by TL phosphors and the results suggest that phosphors are good candidate for absorbed dose determining.

In this work, electron absorbed doses measurements in radiation therapy (RT) were obtained. Radiation measurements were made using thermoluminescent dosimeters of calcium sulfate doped with dysprosium (CaSO4:Dy) and zirconium oxide (ZrO2). TL response calibration was obtained by irradiating TLDs and a Farmer cylindrical ionization chamber PTW 30013 at the same time. Each TL material showed a typical glow curve according to each material. Both calcium sulfate doped with dysprosium and zirconium oxide exhibited better light intensity to high energy electron beam compared with lithium fluoride. TL response as a function of absorbed dose was analyzed. TL response as a function of high energy electron beam was also studied.