A radiochromic film based on leucomalachite green for high-dose dosimetry applications |
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| Affiliation: | 1. Radiation Technology Center, Atomic Energy Research Institute, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia;2. National Center for Radiation Research and Technology (NCRRT), Atomic energy Authority (AEA), 3-Ahmed El-Zomor St., Nasr City, P.O. Box 8029, Cairo 11787, Egypt;1. Astrophysical Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India;2. Physics and Electronics Department, Adekunle Ajasin University, PMB 01, Akungba Akoko, Nigeria;3. IŞIK University, Faculty of Science and Arts, Physics Department, Şile, Istanbul 34980, Turkey;1. National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, P. O. Box 8029, Nasr City, Cairo 11787, Egypt;2. Faculty of Science, Chemistry Department, Beni-Suef University, Beni-Suef City, Egypt;1. National Center for Radiation Research and Technology, Atomic Energy Authority, P.O. box 8029 Nasr City, Cairo, Egypt;2. King Abdulaziz City for Science and Technology, National Center for Irradiation Technology, Riyadh, Saudi Arabia |
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| Abstract: | A colorless polyvinyl butyral film (PVB) based on radiation-sensitive dye of leucomalachite green (LMG) was investigated as a high-dose dosimeter for gamma radiation processing applications in the dose range of 3–150 kGy. The useful applications for such dose range are food irradiation treatment, medical devices sterilization and polymer modification. Gamma irradiation of the film induces a significant intensity of green color, which can be characterized by a main absorption band at 627 nm and a small band at 425 nm. The variation in response of irradiated film stored in the dark and under laboratory light illumination was less than 3% during the first 6 days of storage. The response of film during irradiation was slightly influenced by relative humidity in the range of 12–76%; however, it was significantly affected by temperature in the range of 5–40 °C. The radiation chemical yield was reported to be 6.76 × 10−6 mol/J at the absorbed dose of 30 kGy for the film containing 6.5% of LMG dye. The overall uncertainty associated with routine dose monitoring would be less than 6% at a 95% confidence level if the dosimeter was being corrected for irradiation conditions and being calibrated with reference standard dosimeter in the production facility. |
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| Keywords: | Leucomalachite green Radiochromic film High-dose dosimeter |
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