Investigation of gamma ray shielding, structural and dissolution rate studies of alkali based bismuth borate glass systems with MoO3 added

摘要

Bi2O3-B2O3-Li2O-K2O-MoO3 glass system has been synthesized using melt-quenching technique. gamma ray shielding properties have been evaluated in terms of mass attenuation coefficient at photon energies 356, 662 and 1173 keV. These shielding parameters are also compared with standard nuclear radiation shielding material "barite concrete" at the same photon energies. Most of our prepared samples show better gamma ray shielding properties as compared to barite concrete at the same photon energies. Density, molar volume, XRD, FTIR and Raman studies have been employed to study the structural properties of the prepared glass system. Different structural groups such as [BO3], [BO4], [MoO4] and [MoO6] have been detected in the amorphous network. The presence of non-bridging oxygens, bridging oxygens and change of coordination number has been discussed. The optical absorption spectra are recorded in the wavelength range 200-800 nm and optical band gap is calculated which has shown strong dependence on Bi2O3/B2O3 ratio. The samples have also been tested for their durability by measuring dissolution rate properties using distilled water at 90 degrees C. It has been concluded that increase in the content of Bi2O3 in the composition improves durability and gamma ray shielding properties of the samples.