A new developed radiochromic film for high-dose dosimetry applications

摘要

A colorless polyvinyl butyral film (PVB) based on a radiochromic leuco brilliant blue cyanide dye (LBB), was investigated as a high-dose dosimeter for gamma radiation processing applications in the dose range of 3-165 kGy. The useful applications for such dose range are food irradiation treatment, medical devices sterilization, and polymer modification. Upon gamma-ray exposure, the prepared film undergoes visual color change to deep blue color characterized with an absorption band peaking at 638 nm. The variation in response of irradiated film stored in the dark and under laboratory light illumination was less than 5% during the first week of storage. The effect of temperature and relative humidity on the performance of film during irradiation and the overall uncertainty associated with absorbed dose monitoring were investigated in the present study. (C) 2014 Elsevier Ltd. All rights reserved.