en Radiation Biology Radiation Biology تحقيق بديع Original Research <p style="text-align: justify;"><strong>Background:</strong> The purpose of this work was to investigate the use of polyvinyl chloride (PVC) dyed with methyl red as a high dose radiation dosimetry. <strong>Materials and Methods:</strong> Commercial PVC films from Sabic made from resins PVC57S with thickness of 60 &micro;m and methyl red with a molecular weight of 269.31 were used. Irradiation was carried out using a ⁶⁰Co &gamma;-ray generator with sources arranged in rectangular holder with a total activity of 73.6926 kCi. Absorbance measurements were made by Jasco V- 630 UV-VIS spectrophotometer. Dose rate and irradiation temperature effects as well as post-irradiation storage in dark and indirect daylight conditions on dosimetry performance were also investigated. <strong>Results:</strong> The results showed a linear relationship between the relative absorbance (response) and the absorbed dose at the wavelength 548 nm in the range of 0-150 kGy. The response was found to be independent of both dose rate and irradiation temperature. <strong>Conclusion: </strong>The experimental results indicate that PVC films dyed with methyl red may be used for a high dose radiation dosimetry.</p> <p style="text-align: justify;"></p> Polyvinyl chloride, gamma radiation, methyl red, dosimetry. 263 267 http://ijrr.com/browse.php?a_code=A-10-1-628&slc_lang=en&sid=1 M. Kattan ascientific@aec.org.sy 790031947532846008002 790031947532846008002 Yes Department of Radiation Technology Y. Daher 790031947532846008003 790031947532846008003 No Department of Radiation Technology