الفهرس 
Physicochemical Studies on Some Newly Prepared Dosimeters for Possible Use in Radiation Technology Applications
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Abstract
The main objective of this work is to study the possibility of preparation and the use of dyed films for radiation processing application as radiation dosimeters. Additionally, it aims to manufacture L-glutamic acid pellets as a solid-state EPR dosimeter for wide dose range application. Polyvinyl butyral (PVB) films mixed with xylenol blue (XB) indicator and hexachloroethane (HCE) were prepared for possible application in food irradiation. Upon Þ{u2013}irradiation the films undergo visual color change from yellow (XB, pH 8) to red (XB, pH 2.8) by H+ formation in the presence of HCE. The dosimetric characteristics of films containing different dye and HCE concentrations were investigated spectrophotometrically at n 555 nm. Radiation sensitivity is enhanced max linearly with HCE and, accordingly red color intensity. The prepared films can be applicable in dose range 0.25-10 kGy. Also, EPR pellet dosimeters based on L-Glutamic acid - for routine process control in industrial radiation processing are prepared. The dosimetric properties of Þ-radiation-induced free radicals in the manufactured pellet dosimeter based on L-Glutamic acid were investigated in the dose range of 0.1-150 kGy using Brucker-EMX EPR spectrometer. The EPR spectrum of L-GA dosimeter was characterized by an EPR signal with six lines. The intensity of the signals increases with increasing the absorbed dose up to 150 kGy. The EPR dose response function of irradiated L-GA pellet dosimeter demonstrates linearity in the absorbed dose range of 0.1 {u2013} 15 kGy.