Dosimetry Characterization of Unknown Dye Polyvinyl Alcohol Films

Abstract

In the present study chemical dosimeters having aqueous solutions of crystal violet commercial dye were irradiated by Co60 γ source in the range (0-120)KGy. The standard aqueous solutions were scanned by UV/VIS spectrophotometer for the determination of maximum wave length (λmax) which was found to be 591nm at this value maximum absorbance was found to be 3.5; it was also observed that with increase in dose, absorbance decreases correspondingly. At this value, the absorbance (A) of irradiated samples was measured in UV region. The plot between concentration C and A gave approximate linear relationship and hence verified Beer’s Law which proved that these dye solutions can satisfactorily be used as the dye dosimeters in 0-120kGy gamma dose range.

Radiation Induced Decoloration of Reactive Dye in PVA Films for Film Dosimetry

“…these are used for quantitative purposes [1]. A number of chemical and physical changes are caused in the exposed material by ionizing radiations [2][3][4][5]. The scientific foundation of the radiation technology is an extensive knowledge of chemical, biological and physical effects of radiation on materials [5].…”

Possible Using of Acid Sensitive Dyes Embedded in Poly(vinyl alcohol) in Determination the Irradiation Doses

“…Ionizing radiation is commonly used in many industrial applications such as food preservation, blood irradiation, medical devices sterilization and others. Indicators and dyes are sensitive towards radiation inducing change in their colors after irradiation; they have been used commercially in the area of medicines, radiation sterilization and food irradiation, water and other mineral purification, crosslinking of polymers [1][2][3][4][5]. Such applications require dosimeters with high accuracy to quantify the absorbed doses and indicators to detect visually the radiation exposure.…”

Leuco-Based Composite Resin Dosimeter Film

“…A radiochromic dosimeter is one type of chemical dosimeter. Currently, plastic film dosimeters 1−6 and Fricke dosimeters 7−9 are known as radiochromic dosimeters. Poly(methyl methacrylate) dosimeters can be used in the high-dose region, whereas Fricke dosimeters can be used in the low-dose region.…”