A Study on Dosimetric Characterization of Direct Yellow 12 Dye at High Radiation γ-Dose

Abstract

Aqueous solution of oxygenated Direct yellow 12 dye has been evaluated spectrophotometrically as a possible gamma rays dosimeter. The neutral (pH-7), alkaline (pH-12.5) and acidic (pH-5.5) aqueous solution of the dye were prepared and exposed to various gamma doses. Absorption spectra of unirradiated and irradiated solutions were recorded at 400 nm peak. The increase in absorbance with the increase in irradiation dose was observed from 1 to 6 kGy. The stability response of the dye solution for different environmental conditions such as temperature (low & high), light and darkness were investigated during post irradiation storage for ten days. The dye solution showed high stability in darkness for the studied period. The optical density of the dye solution was found to be decreased at high temperature storage.

Preliminary Studies for Dosimetric Response of a Synthetic Dye for Gamma Dosimetry

“…In the aqueous solution, irradiation can cause the production of transient species i.e., ions and radicals etc. Radiolysis produces hydrated electron, H 2 O 2 , H 2 , OH -, H + and •OH radical as intermediate species; the production depends upon the linear energy transfer value of radiation [13]. Dyes are categorized on the bases of their source, color, structure and method of application in color index.…”

“…*Address correspondence to this author at the Department of Physics, Government College University Faisalabad (GCUF), 38000-Faisalabad, Pakistan; E-mail: relyables@yahoo.com Different dyes have been used by researchers i.e., bromophenol blue [15], methyl red [16], sandalfix golden yellow CRL and sandalfix red C4BLN [4][5][6][7], direct yellow 12 [13], methylene blue [10], alizarin yellow GG [17], reactive yellow 145 [18] and 2, 6 dinitro phenol [19] etc. Radiolysis causes degradation of the dye; and is a well-known radiation induced phenomenon.…”