XXXIII, No. 1, Pp. 1-138
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Authors: Samira Sarshough, Kamal Hadad, and Reza Faghihi
The effects of microsize and nanosize particles in composite structures as well as the incident radiation energy on X-ray attenuation is the focus of this study. To examine these effects, composite samples with different particle sizes of Al2O3 and with different thicknesses were prepared. Characteristic X-rays are applied as monochromatic X-rays and measurements were performed using an X-ray tube with a secondary excitation source instead of radioisotopes. In order to improve the efficiency and minimize the background effects a special detection system was designed and prepared. The linear attenuation coefficients of these samples are measured for X-ray photo energies of 6.40-28.49 keV. The results show that these low energy X-ray beams are more attenuated by nano-structured material compared to the micro-structured one.
linear attenuation coefficient, characteristic X-ray, nanostructure, microstructure
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