The effect of gamma-irradiation on the density of various types of silica
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Influence of alumina addition and gamma irradiation on the lithium borosilicate glasses
2018, Radiation Physics and ChemistryCitation Excerpt :The 1 kGy gamma irradiation also causes densification of glass samples by the conversion of BO3 to BO4 and hence it can be used as a nuclear waste immobilization (Singh et al., 2008). Ruller and Friebele (1991) have suggested that, gamma irradiation causes the breaking of higher membered rings of SiO4 tetrahedra and gives rise to more compact glass network. When lower members of the high-membered rings rebind, they form smaller membered ring configuration hence the density increases.
Enhanced magnetic behaviour and cell proliferation of gamma irradiated dual metal ions co-doped hydroxyapatite – poly(methyl methacrylate) composite films
2018, Reactive and Functional PolymersCitation Excerpt :Ruller and Frieabele reported that gamma irradiation lead to the expansion and compaction of the materials. The expansion may be caused due to the hole trapping in the interconnected networks of the atoms whereas; the compaction may be caused by the displacements, electronic defects and breaking of bond produced by the radiation resulting in decrease in the band gap [20]. Similarly, in the present study, there is a possibility of both compaction and expansion of the material which may result in the electronic defects and trapping of hole in the polymer matrix which was responsible for the decrease in band gap of the irradiated composite films.
Influence of gamma radiation on the structural and optical properties of thulium-doped glass
2017, Materials Science and Engineering: BCitation Excerpt :When the radiation dose exceeds 20 kGy, the densities have a decreasing pattern that attributes to the expansion that has occurred in the glass, which comes from the formation of voids [26]. According to Ruller et al. [27], the voids are produced when there is trapping of electrons or holes formed by ionization in the network. As a result, it will cause the bond to rupture or increase in length.
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2008, Radiation Physics and Chemistry
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