EFFECT OF GAMMA RADIATION ON A MIXED DYE FILM AND ITS POSSIBLE USE AS A RADIATION DOSIMETER

Sayeda Elewa Eid, Abdel Gawad Mohamed Rabie, Seif El-Din Ebraheem, Asmaa Sobhy

Abstract


Dyed poly vinyl alcohol (PVA) films prepared by a simple technique of casting aqueous PVA solution incorporating a mixture of two dyes namely  chlorophenol red  (CPR) and Quinaldine Red (QR) on a horizontal glass plate  are useful as high  dose dosimeter in the dose range 2-30 kGy range. The colour of these films change from deep red to yellow when exposed to gamma radiation. Chloral hydrate was added with different concentrations. The response of the prepared films can be modified either by change of chloral hydrate concentration or ratio of the two dyes. As a result, these films can be used as a dosimeter in two dose ranges. The dosimetric parameters, e.g.; dose response, effect of relative humidity on response as well as pre- and post-irradiation stability of these films were investigated.

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DOI: http://dx.doi.org/10.17628/ecb.2017.6.510-513

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