TITLE:
Toluidine Blue O-Gelatin Gel Dosimeter for Radiation Processing
AUTHORS:
S. M. Gafar, M. A. El-Kelany, M. A. El-Ahdal, S. R. El-Shawadfy
KEYWORDS:
Gel, Toluidine Blue O, Dosimeter, γ Rays and Low Dose
JOURNAL NAME:
Open Journal of Polymer Chemistry,
Vol.4 No.3,
August
14,
2014
ABSTRACT: In this study the spectrophotometric response of the Toluidine Blue O
(TBO)-gelatin gel dosimeter irradiated with gamma rays was characterized.
Preparation of dyed-gelatin gel takes place in neutral medium; to give
eventually gel dosimeter has a sharp absorbance peak at 635 nm that bleaches
quantitatively upon irradiation and the colour change can be measured with
UV-VIS spectrophotometer. The useful dose range was 1 - 150 Gy. The radiation
chemical yield (G-value) of gel dosimeter was calculated and found to increase by
increasing concentration of dye. Post-irradiation storage on the response of
gel is discussed. The dose response function, radiation sensitivity, and
dependences of the response on environmental factors were studied.