experimental study on fricke gelatin gel dosimeters

‎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.