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Generation and bleaching of E′-centers induced in a-SiO2 by γ-irradiation

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Abstract

Radiation indicator as well as radiation shielding of extremely high dose have been proposed. Three different types of a-SiO2 namely, G1-xerogel, G2-fused and G3-natural silica were monitored by EPR before and after γ-irradiation. The E′-center has been used for EPR radiation characterization of a-SiO2 with assuming that the signal intensity changes with γ-irradiation differently as those of other EPR signals do. Formation and decay of the E′-center are closely related with its precursor, diamagnetic oxygen vacancies. Gamma ray of large dose (500 kGy) creates oxygen vacancies giving up-and-down irradiation effects, which, therefore, might be useful for high dose radiation indicator (G1) and radiation shielding (G2 and G3).

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Authors and Affiliations

  1. National Center for Radiation Research and Technology, Atomic Energy Authority, Nasr-City, P. O. Box 8029, Cairo, 11371, Egypt

    H. H. Mahmud, A. Mansour & F. M. Ezz-Eldin

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  1. H. H. Mahmud
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  2. A. Mansour
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  3. F. M. Ezz-Eldin
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Correspondence to A. Mansour.

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Mahmud, H.H., Mansour, A. & Ezz-Eldin, F.M. Generation and bleaching of E′-centers induced in a-SiO2 by γ-irradiation. J Radioanal Nucl Chem 302, 261–272 (2014). https://doi.org/10.1007/s10967-014-3174-2

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  • DOI: https://doi.org/10.1007/s10967-014-3174-2

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