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Subject: Others × Author: Gangwar, Rajat × End date: 2020 × Start date: 2020 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Study of physical and radiation shielding parameters of erbium doped zinc boro-tellurite glasses
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2020-10) Gangwar, Rajat; Singh, Virendra
    In this work, physical and radiation shielding parameters of Erbium doped Zinc Boro-tellurite (EZBT) glasses were studied. The glasses of composition 20ZnO- 25B2O3- (55-x) TeO2-xEr2O3 with x= 0, 0.5, 1.0, 1.5 and 2.0 in mol % were synthesized using melt-quenching method. These samples were characterized by different techniques i.e. Standard displacement technique, X-ray diffraction and FTIR to examine various properties. The values of density and oxygen packing density (OPD) were increased with increasing concentration of erbium while the molar volume was found to be decreasing with increasing concentration of erbium oxide. The amorphous nature of these glasses was confirmed by XRD technique. The mass attenuation coefficient ( ) of the samples was obtained using WinXCom software and other relevant relations were used to calculate the Half-value layer (HVL), Mean free path (MFP), effective atomic number ( ) and effective electron density ( ) in the energy 0.01 MeV− 10 MeV. Results showed that the shielding properties improve with the increasing amount of erbium oxide and the maximum values of and were found for 2.0EZBT glass sample. Also, that particular sample has shown the lower value of HVL and MFP, which results in more attenuation and thus better shielding features. The parameters at diagnostic energies (20 keV, 30 keV, 40 keV and 60 keV) were compared with lead glass and ordinary concrete. The outcome shows that all the glass samples are capable of replacing ordinary concrete and lead glass at 40 keV and 60 keV. Moreover, 2.0EZBT showed the best shielding performance among the selected glasses at medical diagnostic energies. Hence, the results of this current investigation are useful in designing the lead-free radiation shielding material in diagnostic radiology.