Study on X-ray Attenuation of Bismuth Oxide Nanoparticles by Monte- Carlo Method

Abstract

(In English) The Monte Carlo method is one of the important models of choice for simulating photon transport. In this research, bismuth oxide nanoparticles were synthesized through precipitation method (microwave method) . X - ray Attenuation of Bismuth Oxide Nano Particles has studied by Monte Carlo Method. It is the first time to obtain a series of results for X - ray Attenuation of Bismuth Oxide Nano Particles by Monte Carlo Method. These results are the first - hand calculation data that may help to understand the mechanism of Monte Carlo Method. This thesis provides all the details necessary for implementation of a Monte Carlo program. Variance reduction schemes that improve the efficiency of the Monte Carlo method are discussed. The study found the derivation of an equation to calculate the mass attenuation coefficient for X - ray in terms of the percentage of concentration of the solution instead of the percentage of atomic or molecular weights . The result which obtained from this equation is the mass attenuation coefficient of bismuth oxide nanoparticles increased with increasing bismuth oxide nanoparticles concentration and decreased with increased X - ray energy . The simulation results were validated by comparing them with National Institute of St andards and Technology (NIST) values. For narrow beam geometry, we found a maximum difference of - 0.58192 % for water , - 2.1372 %, - 2.1031 % and - 2.2385% for 0.5, 1 and 2 % Bi 2 O 3 concentrations respectively. For broad beam simulation, we found an effect ive mass attenuation coefficient larger the mass energy absorption coefficient and smaller than the mass attenuation coefficient