Dosimetry Characterization of Unknown Dye Polyvinyl Alcohol Films

Dosimetry Characterization of Unknown Dye Polyvinyl Alcohol Films

Muhammad Attique Khan Shahid, Noureen Kousar, Naseem Akhtar, Taqmeem Hussain, Mariam Saeed Awan, Arfa Mubashir, Bushra Bashir and Asif Javed

http://dx.doi.org/10.6000/1927-5129.2012.08.02.42

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.

Keywords: Aqueous solutions, the crystal violet dye, dosimetry, gamma irradiation, Optical density (OD), decolouration.