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The aim of this work is to characterize the ferrous sulfate-benzoic acid-xylenol orange (FBX) aqueous chemical dosimeter developed at our laboratory, prepared using ultra pure water, by measuring the absorption spectrum, dose response curve, precision and accuracy, energy and dose rate dependency and stability of response. The FBX readings were evaluated by using an accurate spectrophotometer. Experimental data were obtained using various nominal energies 6 MV, 18 MV, 12 MeV, and 15 MeV, including the 60Co γ-rays beam. The calibration of the dosimeters was performed using the ionization chamber as a reference dosimeter. The results show that the FBX dosimeter has a good precision of about 0.2%, no significant energy, dose rate dependence and a linear dose-response relationship in the 1-5 Gy range.

Dosimetric proprieties of FBX dosimeter for high energy photon and electron beams