Title: Suitability of gafchromic EBT2 films for dosimetry of low gamma-rays
Authors: E.M. Antar; S.M. Gafar; M. El-Ahdal
Addresses: Dosimetry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority (AEA), P.O. Box 029, Nasr City, Cairo, Egypt ' Dosimetry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority (AEA), P.O. Box 029, Nasr City, Cairo, Egypt ' Dosimetry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority (AEA), P.O. Box 029, Nasr City, Cairo, Egypt
Abstract: Radiochromic film has become an important tool to assess complex dose distributions. As a self-developing film, EBT2 is a perfect fit for the processor-less environment. Radiation dosimeters based on EBT2 containing active layer, marker dye (coded) and stabiliser have been prepared. EBT2 films undergo radiation when subjected to gamma rays inducing change in the absorption spectra in the film which converts from faint green to deep green peaking at 631 nm, and upon irradiation the new developed peak and their amplitudes with the original peak increase with the increase of absorbed dose. The useful dose range of this film is 1 cGy to 15 Gy. So it can be used as a dosimeter in the field of blood irradiation and radiotherapy. The effect of relative humidity during irradiation on the response of films as well as pre- and post-irradiation stability at different storage conditions was described.
Keywords: radiochromic film; radiation; dosimetry; blood irradiation; radiotherapy; gafchromic EBT2 films; low gamma rays; low radiation; complex dose distributions; radiation dosimeters; relative humidity.
International Journal of Low Radiation, 2014 Vol.9 No.5/6, pp.317 - 326
Received: 26 Feb 2014
Accepted: 19 Aug 2014
Published online: 27 Mar 2015 *