Study of gamma radiation shielding properties of ZnO - T eO 2 glasses

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Date: Aug. 2017
From: Bulletin of Materials Science(Vol. 40, Issue 4)
Publisher: Springer
Document Type: Report
Length: 361 words

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To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1007/s12034-017-1425-x Byline: Shams A M Issa (1,2), M I Sayyed (2), Murat Kurudirek (3) Keywords: Mass attenuation coefficient; effective atomic number; electron density; exposure buildup factors; tellurite glass Abstract: Mass attenuation coefficient ([mu] .sub.m) ( [micro] m ) , half value layer (HVL) and mean free path (MFP) for x ZnO- x ZnO - (100 -x) TeO.sub.2 - x ) TeO 2 , where x = 10 x = 10 , 15, 20, 25, 30, 35 and 40 mol%, have been measured for 0.662, 1.173 and 1.33 MeV photons emitted from .sup.137 Cs 137 Cs and .sup.60 Co 60 Co using a 3 3 3 x 3 inch NaI(Tl) detector. Some relevant parameters such as effective atomic numbers ( Z.sub. eff) Z eff ) and electron densities ( N.sub. el) N el ) of glass samples have been also calculated in the photon energy range of 0.015--15 MeV. Moreover, gamma-ray energy absorption buildup factor (EABF) and exposure buildup factor (EBF) were estimated using a five-parameter Geometric Progression (GP) fitting approximation, for penetration depths up to 40 MFP and in the energy range 0.015--15 MeV. The measured mass attenuation coefficients were found to agree satisfactorily with the theoretical values obtained through WinXcom. Effective atomic numbers ( Z.sub. eff) Z eff ) and electron densities ( N.sub. el) N el ) were found to be the highest for 40 ZnO- ZnO - 60 TeO.sub.2 TeO 2 glass in the energy range 0.04--0.2 MeV. The 10 ZnO-90 TeO.sub.2 10 ZnO - 90 TeO 2 glass sample has lower values of gamma-ray EBFs in the intermediate energy region. The reported new data on radiation shielding characteristics of zinc tellurite glasses should be beneficial from the point of proper gamma shield designs when intended to be used as radiation shields. Author Affiliation: (1) Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt (2) Physics Department, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia (3) Department of Physics, Faculty of Science, Ataturk University, 25240, Erzurum, Turkey Article History: Registration Date: 19/04/2017 Received Date: 28/05/2016 Accepted Date: 24/10/2016 Online Date: 25/07/2017

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Gale Document Number: GALE|A500838149