Effective atomic numbers of Bioactive Glasses for Photon energy absorption Anil Shantappa1*, Keka Talukdar2 and S. M. Hanagodimath3 1
Department of Physics, Guru Nanak Dev Engineering College, Bidar-585403, Karnataka, India 2 Department of Physics, Nadiha High School, Durgapur-713208, West Bengal, India 3
Department of Physics, Gulbarga University, Gulbarga 585 106, Karnataka, India *Corresponding Author E-mail:
[email protected]
Abstract: This work was carried out to study the nature of mass energy- absorption of bioactive glasses for gamma or X-rays. Bioactive glasses are a group of synthetic silica-based bioactive materials with unique bone bonding properties. Bioactive glasses are widely used in joint replacements, bone plates, dental implants for tooth fixation, blood vessel prostheses, heart valves, skin repair devices (artificial tissue), contact lenses, breast implants, etc. The biological effect of ionizing radiation on human beings depends on absorbed dose, types of radiation like alpha, beta, gamma, etc and organs irradiated. Photons entering the body not only loose energy and are finally absorbed, but also give rise to new photons by multiple scattering. In the present study, we have calculated the effective atomic number for photon energy absorption of selected bioactive glasses such as SiO2-Na2O-CaO-P2O5, SiO2-CaOP2O5 and SiO2-CaO in the energy region 1 keV to 20 MeV. It is observed that variation in effective atomic number (ZPEA, eff) depends also upon the weight fractions of selected bioactive glasses and range of atomic numbers of the elements. The ZPEA, eff plays very significant role in the estimation of absorbed dose in low energy region (
