Study the Gamma Ray Attenuation of 60Co in the Polyester Composite_Calcium Ferrite Powder Supported Shields

Abstract

This study included the production of composite materials shields of polyester fortified by Calcium Ferrite powder prepared by two different temperature degrees of annealing (800co and 1000co) to get the various size of the used granular powder.
Geiger counter tube system used to study of the susceptibility of these shields on gamma radiation attenuation that emitted from the 60Co, were five types of nuclear shielding was prepared, two of them the powder annealed at temperatures 800co different concentrations of the proportion of the addition are 2% and 7% were used in, and the other two the powder annealed at 1000co and with the same concentrations above, the latter type is the pure polyester shield without any addition. The results showed that the linear attenuation coefficient μ increases and transmission coefficient T.F decreases with reinforcement powder concentration increasing in the sample and the granular size of the reinforcement powder increasing , and the relationship between the transmission factor the thickness of the shield X is an inverse, results also showed that the half values layer HVL and tenth value layer values TVL decrease with increasing of reinforcement powder concentration in the polymer and increasing of the granular powder size. The best results were achieved using a shield composite fortified by calcium Ferrite powder that annealed at 1000co with a concentration of 7%, indicating that the best.