High-dose Film Dosimeter Based on a Mixture of BG and BPB Dyed Poly(vinyl butyral) | ||||
| Egyptian Journal of Radiation Sciences and Applications | ||||
| Article 10, Volume 24, Issue 1, June 2011, Page 143-152 PDF (545.23 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejrsa.2011.1461 | ||||
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| Abstract | ||||
| DYED poly(vinyl butyral) (PVB) film, prepared by a simple technique of casting aqueous solutions of PVB containing a mixture of brilliant green (BG), bromo phenol blue (BPB) and chloral hydrate (CCl3CH(OH)2, on a horizontal glass plate are useful as routine high-dose dosimeters. This flexible plastic film changes its colour from green to pale yellow to colourless on exposure to γ-rays photons due to the consequent lowering of pH caused by HCl generated from the radiolysis of chloral hydrate. The useful dose rang extends up to 60 kGy. Effect of different chloral hydrate concentrations on response of the film was investigated. Although the film gives excellent stability before and after irradiation when stored in the dark at room temperature beside excellent stability up to 80% relative humidity (RH). The overall combined uncertainty (at 2σ) associated with measurement of response (ΔA.mm-1) at 634 nm for dose range 1-60 kGy is 5.63%. | ||||
| Keywords | ||||
| Brilliant green-Bromo phenol blue); Poly(vinyl butyral); γ-rays dosimeter | ||||
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