Theory of absorption of gamma rays on the surface and internal of sio2 Nano powder

We have theoretically investigated gamma rays absorption on the nanosilica surface. Calculations revealed that absorption of gamma rays was observed not only on the surface, but also inside of SiO2 nanopowder, because radiation effects of selected nano-particles more than the macro-particles. If the system gets 20000 photons; 0,0576 photons absorbs in 20nm thickness (this is same silica nanopowder diameter), 2,879796797 photons in 1μm thickness and 2682,24863 photons in1mm thickness. Nano silica has more surface, therefore, more surface effects and absorption of gamma rays on the surface has got in this sample. We also take out specific equation for absorption gamma ray on the nanosilica surface. We have investigated the effects of secondary electrons and photons emitted from surrounding materials on defect formation in silica nanopowder under γ-ray irradiation.