A study of dosimetry characteristics of GAF DM-1260 radiochromic films

Abstract The dosimetric characteristics of gamma-ray, x-ray and electron irradiated GAF-DM-1260 radiochromic film have been studied, and the dependence of radiation-induced film absorbance on irradiation temperature and reading temperature and the changes of the absorption spectrum peaks at different reading temperatures and absorbed doses (3×10 1 to 5×10 4 Gy) are reported. It is shown that the responses are independent of the gamma-ray dose rate in the dose rate range considered in the experiment. The film response characteristics as a function of the absorbed dose to 60 Co gamma irradiation at the spectrophotometric reading wavelengths of 400, 580, 600, 650 and 670 nm and two absorption peaks are determined as well as the response characteristics to the electron beam at the reading wavelength of 400 nm. The results demonstrate that the film responses to gamma rays, x-rays and a 3.8 MeV electron beam are equivalent, over the absorbed dose rate range of about 0.8 Gy·s −1 to 5×10 8 Gy·s −1 . Some advice and points of view about the dosimetric characteristics of the film and some problems in usage are provided according to the experimental results.