Study on the response of Fricke Agarose gel dosimeters (FAX)

Edalatkhah, E.; Rezaeian, P.; Kashian, S.

doi:10.24200/nst.2022.1363

Study on the response of Fricke Agarose gel dosimeters (FAX)

Document Type : Scientific Note

Authors

E. Edalatkhah

P. Rezaeian

S. kashian

Radiation Applications Research School, Nuclear Science and Technology Research Institute, P.O.Box: 1339-14155, Tehran-Iran

https://doi.org/10.24200/nst.2022.1363

Abstract

Considering the importance of quality control of radiotherapy systems and 3D dose mapping possibility done with a Fricke agarose gel dosimeter, this dosimeter based on ferrous solution and agarose gel was prepared. The prepared Fricke gel dosimeters was investigated under gamma irradiation with a dose range up to 20 Gy. Concerning the effect of the gel dosimeter constituent’s concentration on the response of the dosimeter, different compositions were surveyed for better sensitivity and repeatability. So, the responses were evaluated for different concentrations of ferrous ion, sulphuric acid, and the indicator. We found that the Fricke agarose gel dosimeter has a linear behavior up to 20 Gy. In addition, the best composition of Fricke agarose gel dosimeter with high sensitivity and stability was determined to be 0.2 mM ferrous, 25 mM sulphuric acid, and 0.15 mM Xylenol orange.

Highlights

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Keywords

Fricke gel dosimeter

Agarose

Absorption spectrum

Dose-response curve

20.1001.1.17351871.1401.43.1.20.3