Investigations of gamma ray and fast neutron shielding properties of tellurite glasses with different oxide compositions

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Author: M.I. Sayyed
Date: Nov. 2016
From: Canadian Journal of Physics(Vol. 94, Issue 11)
Publisher: NRC Research Press
Document Type: Report
Length: 3,240 words
Lexile Measure: 1500L

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Abstract :

In the present paper, the basic radiation parameters of tellurite glasses with different forming oxides ([B.sub.2][O.sub.3], BaO, [K.sub.2]O, [V.sub.2][O.sub.5], W[O.sub.3], and ZnO) have been studied over a wide photon energy range from 1 keV to 100 GeV, using WinXCom program. These parameters are the mass attenuation coefficient ([mu]/[rho]), effective atomic number ([Z.sub.eff]), and electron density ([N.sub.e,eff]). In addition, the macroscopic effective removal cross sections (2R) for fast neutrons have been calculated. The dependence of different parameters on incident photon energy and chemical content has been discussed. Among the selected glass systems Te[O.sub.2]-W[O.sub.3] and Te[O.sub.2][B.sub.2][O.sub.3] showed superior shielding properties for gamma-ray and neutrons, respectively. It is shown that the selected glass systems have higher values of the mass attenuation coefficients ([mu]/[rho]) than concretes and 0.7Si[O.sub.2]:0.3BaO glass. These results indicate that tellurite glasses can be used as radiation shielding materials. Key words: tellurite glasses, gamma-ray, mass attenuation coefficient, effective atomic number, radiation shielding. Nous utilisons ici le programme WinXCom pour etudier, sur un domaine d'energie des photons de 1 keV a 100 GeV, les parametres de radiation de base de verres de tellurite avec differents oxydes ([B.sub.2][O.sub.3], BaO, [K.sub.2]O, [V.sub.2][O.sub.5], W[O.sub.3] et ZnO). Ces parametres sont le coefficient d'attenuation massique ([mu]/[rho]), le nombre atomique effectif (Zefr) et la densite d'electrons (Ne eff). Nous calculons aussi les sections efficaces de retrait effectif macroscopique des neutrons rapides (2R). Nous discutons la dependance des differents parametres sur l'energie des photons et le contenu chimique. Parmi les verres etudies, Te[O.sub.2]-W[O.sub.3] et Te[O.sub.2]-[B.sub.2][O.sub.3] montrent le meilleur blindage contre les rayons y et les neutrons respectivement. Les resultats montrent que les verres selectionnes ont de plus hautes valeurs du coefficient d'attenuation massique (^/p) que le beton et le verre 0.7Si[O.sub.2]: 0.3BaO. Ces resultats montrent donc que les verres de tellurite peuvent etre utilises comme blindage contre les radiations. [Traduit par la Redaction] Mots-cles: verres de tellurite, rayon y, coefficient d'attenuation massique, nombre atomique effectif, blindage contre les radiations.

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Gale Document Number: GALE|A470463953