Abstract
Dyed poly(vinyl alcohol) (PVA) films were prepared by casting the aqueous solutions of PVA incorporating Rose Bengal (RB) dye with or without chloral hydrate on a horizontal glass plate. Such films are useful as routine high-dose dosimeters. These flexible plastic film dosimeters are bleached when exposed to n -ray photons. The useful range of application of these films depends on the concentration of chloral hydrate. RB/PVA film without chloral hydrate is suitable for application in the range of absorbed doses 10-150 kGy. The maximum range of RB/PVA films containing chloral hydrate ranges from 5 to 20 kGy depending on, and inversely proportional to, chloral hydrate concentration in the film. The radiation-chemical yield (G-value) of films was calculated to be in the range from 0.272 to 10.3 µmol/J, where it increases with the increase of both RB and chloral hydrate concentration in the film. The effects of temperature and relative humidity during irradiation as well as pre- and post-irradiation storage, on the radiation response of films are studied. Although, the response of these films depends on relative humidity during irradiation, they are highly stable for long times before and after irradiation when stored in dark and they are not affected by temperature that ranged from 0°C to 45°C during irradiation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: International Journal of Polymeric Materials and Polymeric Biomaterials
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.