El-Ahdal, M., Baraka, A., Khalil, I. (2008). OPTICAL ABSORPTION OF GAMMA IRRADIATED SOLID SUGAR. test, 4(4th International Conference On Chemical & Environmental Engineering), 597-606. doi: 10.21608/iccee.2008.38470
M. A. El-Ahdal; A. A. Baraka; I. M. Khalil. "OPTICAL ABSORPTION OF GAMMA IRRADIATED SOLID SUGAR". test, 4, 4th International Conference On Chemical & Environmental Engineering, 2008, 597-606. doi: 10.21608/iccee.2008.38470
El-Ahdal, M., Baraka, A., Khalil, I. (2008). 'OPTICAL ABSORPTION OF GAMMA IRRADIATED SOLID SUGAR', test, 4(4th International Conference On Chemical & Environmental Engineering), pp. 597-606. doi: 10.21608/iccee.2008.38470
El-Ahdal, M., Baraka, A., Khalil, I. OPTICAL ABSORPTION OF GAMMA IRRADIATED SOLID SUGAR. test, 2008; 4(4th International Conference On Chemical & Environmental Engineering): 597-606. doi: 10.21608/iccee.2008.38470

OPTICAL ABSORPTION OF GAMMA IRRADIATED SOLID SUGAR

The International Conference on Chemical and Environmental Engineering
Article 38, Volume 4, 4th International Conference On Chemical & Environmental Engineering, May 2008, Pages 597-606    PDF (281.18 K)
Document Type: Original Article
DOI: 10.21608/iccee.2008.38470
Authors
M. A. El-Ahdal1; A. A. Baraka2; I. M. Khalil3
1Radiation Protection and Dosimetry Department, National Centre for Radiation Research and Technology.
2Egyptian Armed forces.
3Egyptian Atomic Energy Authority.
Abstract
ABSTRACT
In the case of radiation emergency, a sugar method, with readout by UV spectra analysis as personnel monitor for the affected population, is proposed. Characteristics of the method are economics, universal availability and portability, with quantitative monitoring characteristics for ionizing radiation. Relative simplicity of the procedure for evaluating dose to individuals or to households after irradiation and readout was used this widely available and compact monitor. In this study, the simpler optical absorption studies show the presence of a distinctive band in the UV region (269nm), whose intensity changes with the irradiation dose. The dose linearity of the sugar solution with the absorbance at peak is experimentally verified from 0.25 Gy to 40kGy. Fading effect was studied for all the used radiation range. These results might be interpreted in terms of the formation of free radicals and possible chain scission and crosslinking along the sugar molecular chains. The optical energy gap and Urbach energy of the sugar solution also investigated. Dose (D) – absorbance difference (A-Ao) relationship may be followed up using the two equations A-A0 = 0.0439 D (kGy)+ 0.054, with linear regression 0.969 in the dose range from 0.25 kGy to 2.0 kGy and A-A0 = 0.0165 D (kGy)+ 0.173 with linear regression 0.9660 in the dose range from 2.0 kGy to 40 kGy.
Keywords
Dosimetry; gamma radiation; Suger; UV-analysis
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