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    An extensive investigation on gamma ray shielding features of Pd/Ag-based alloys
    (Korean Nuclear Soc, 2019) Ağar, Osman; Sayyed, M., I; Akman, Erdi; Tekin, H. O.; Kacal, M. R.
    A comprehensive study of photon interaction features has been made for some alloys containing Pd and Ag content to evaluate its possible use as alternative gamma radiations shielding material. The mass attenuation coefficient (mu/rho) of the present alloys was measured at various photon energies between 81 keV-1333 keV utilizing HPGe detector. The measured mu/rho values were compared to those of theoretical and computational (MCNPX code) results. The results exhibited that the mu/rho values of the studied alloys are in the same line with results of WinXCOM software and MCNPX code results at all energies. Moreover, Pd75/Ag25 alloy sample has the maximum radiation protection efficiency (about 53% at 81 keV) and lowest half value layer, which shows that Pd75/Ag25 has superior gamma radiation shielding performance among the other compared alloys. (C) 2018 Korean Nuclear Society, Published by Elsevier Korea LLC.
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    Production of barite-doped yarns and testing their usability for ionizing and electromagnetic radiation shielding
    (Elsevier, 2022) Akman, F.; Özkan, F.; Ozel, F.; Aydemir, H.; Kacal, M. R.; Ağar, Osman
    Barite-doped and polypropylene-based masterbatches were produced at different ratios, and 1 × 1 Rib type weaving process was carried out by obtaining filament yarns. While the morphological and structural properties of the obtained textile products were investigated with XRD, FTIR and SEM, thermal stabilities were investigated with TGA. Then, the shielding abilities of the products against ionizing and electromagnetic radiation were analyzed. The shielding properties against ionizing radiation were studied with mass attenuation coefficient, half value layer, effective atomic number and radiation protection efficiency parameters at nine different energies in the energy range of 17.75 to 81.0 keV. The shielding properties against electromagnetic radiation were studied in the range of 15 to 40 GHz. To test the usability of the products, antibacterial activity tests, breaking strength and elongation tests and surface resistivity tests were carried out. It has been observed that all products are suitable in terms of usability and also, ionizing and electromagnetic radiation shielding properties increase with increasing barite content, and the product containing 10% barite is a good shielding material for radiation compared to others. The data of the present survey can be quite helpful for possible applications such as aerospace, medicine, science, nuclear industry. © 2022 Elsevier Ltd.