Title of article
Experimental study on Fricke gelatin gel dosimeters
Author/Authors
Pourranjbar ، Farshid Physics Department - Imam Khomeini International University , Edalatkhah ، Elham Radiation Applications Research School - Nuclear Science and Technology Research Institute , Abtahi ، Mohammad Mahdi Physics Department - Imam Khomeini International University
From page
57
To page
61
Abstract
Fricke gel dosimeters obtained by modifications on standard Fricke dosimeter presents some advantages like easy preparation, tissue equivalence, good reproducibility and dose mapping. In this work, dose response characteristics of Gelatin Fricke gel dosimeters was investigated and compared with Fricke agarose gel dosimeters in terms of sesitivity. After prepration of three different formulation of Gelatin Fricke gel dosimeters and gamma irradiation of the samples, a spectrophotometer was applied to measure the optical absorbance of the samples. Results indicate a linear dose range response of 10 to 30 Gy, as well as increased gelatin concentrations cause the sensitivity of the dosimeter to detereorate with a 80% reduction of dose response for a change in gelatin concentration from 3 to 8 weight percent. Obtained coefficient variation verifies the good repeatability of the gel response. The gel dosimeter has no dose rate dependence. Comparison of the most sensitive Gelatin Fricke gel sample with the prepared Fricke agarose gel samples confirm that Fricke agarose dosimeter is more sensitive than Gelatin Fricke gel dosimeter.
Keywords
Fricke gel dosimeters , Gelatin , Agarose , Response curve
Journal title
Radiation Physics and Engineering
Journal title
Radiation Physics and Engineering
Record number
2760708
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