Development of a radiation-sensitive indicator

Abdel-Fattah, A.A.; El-Kelany, M.; Abdel-Rehim, F.

doi:10.1016/0969-806x(96)00014-x

Cited by 21 publications

(12 citation statements)

References 9 publications

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“…Several dyed Poly Vinyl Alcohol (PVA) blends containing chlorine have been investigated for possible use in dosimetry for measurement of radiation dose in γ-ray and electron beam facilities [14][15][16] . They contain pH-indicating dye and water-soluble chlorinecontaining substances.…”

Section: Introductionmentioning

confidence: 99%

Dose Response and Optical Properties of Dyed Poly Vinyl Alcohol-Trichloroacetic Acid Polymeric Blends Irradiated with Gamma-Rays

Susilawati¹

2009

American Journal of Applied Sciences

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Problem statement: The effects of gamma irradiation on optical properties of cresol-red dyed Poly Vinyl Alcohol (PVA) blended with Trichloroacetic Acid (TCA) for possible use in dosimetry and measurement of radiation dose in gamma rays have been studied using both Raman spectroscopy and UV-Visible spectrophotometer method. Approach: The dosimeters are composed of Poly Vinyl Alcohol (PVA), Trichloroacetic Acid (TCA) at various concentrations are 20, 25, 30 and 35%, and acid-base indicator cresol-red dyed. Results: The dosimeters were irradiated to doses up 12 kGy using ⁶⁰Co gamma ray source at a constant dose rate. The polymeric films undergo color change from purple to yellow due to radiation-induced acid formation. The molecular vibrational spectra were measured using Raman spectroscopy, resulting in a decrease of the Raman intensity inelastic scattering of C-Cl molecular stretching from TCA with increasing dose. The absorption spectra were measured using UV-visible spectrophotometer in the wavelength range 350-700 nm, resulting in a decrease of the absorbance at 575 nm band peak with increasing dose. The dose sensitivity D₀ increases with increasing TCA concentration for both scattering and absorption methods. The optical absorption studies show that the direct and indirect optical energy band gaps and optical activation energies are dependent on dose and TCA concentration. Conclusion: The shift in the optical band gap E_g values towards lower energy with radiation dose leads to a shift of the optical activation energy DeltaE value towards the lower energy region with increasing dose. The optical band gap (E_g) and the absorption edge decrease with increasing dose attributed to the structural disorder of polymer blends due to dehydrochlorination of trichloroacetic acid with increasing dose. The energy width of the tail of localized state in the forbidden band gap was evaluated using the Urbach-edges method. It was found that the activation energy (DeltaE) is less dependent of radiation dose but strongly dependent on concentration of blends

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Section: Introductionmentioning

confidence: 99%

Dose Response and Optical Properties of Dyed Poly Vinyl Alcohol-Trichloroacetic Acid Polymeric Blends Irradiated with Gamma-Rays

Susilawati¹

2009

American Journal of Applied Sciences

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“…According to the study of Abdel-Fattah et al (1996) The yield of HCl is presumed to have the following equation:…”

Section: Interpretation Of the Enhancement Of Sensitivity And Better mentioning

confidence: 99%

Dyed polyvinyl chloride films for use as high-dose routine dosimeters in radiation processing

Hoa

Duong

Kojima

2004

Radiation Physics and Chemistry

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“…Radiation sensitivity of these dosimeters was improved by the addition of chlorine-containing material, chloral hydrate. Poly(vinyl alcohol) (PVA) films incorporating an acidsensitive dye, bromophenol red, and chloral hydrate was prepared and investigated for dose up to 5 kGy [20]. These dyed films change their color from violet to pale yellow significantly upon c-irradiation.…”

Section: Introductionmentioning

confidence: 99%

Radiation-induced coloration of xylenol blue/film containing hexachloroethane for food irradiation applications

Soliman

Beshir

Abdel-Fattah

et al. 2016

J Radioanal Nucl Chem

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Polyvinyl butyral films mixed with xylenol blue (XB) indicator and hexachloroethane (HCE) were prepared for possible application in food irradiation. Upon c-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 k max 555 nm. Radiation sensitivity is enhanced with HCE and, accordingly red color intensity. The prepared films can be applicable in dose range 0.25-10 kGy with uncertainty of dose reaching 4.45 % at 1r.

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Development of a radiation-sensitive indicator

Cited by 21 publications

References 9 publications

Dose Response and Optical Properties of Dyed Poly Vinyl Alcohol-Trichloroacetic Acid Polymeric Blends Irradiated with Gamma-Rays

Dose Response and Optical Properties of Dyed Poly Vinyl Alcohol-Trichloroacetic Acid Polymeric Blends Irradiated with Gamma-Rays

Dyed polyvinyl chloride films for use as high-dose routine dosimeters in radiation processing

Radiation-induced coloration of xylenol blue/film containing hexachloroethane for food irradiation applications

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