Akademik Veri Yönetim Sistemi
Radiation Effects and Defects in Solids, 2026 (SCI-Expanded, Scopus)
In this study, Fe–Cr–Ni–Ti–Ag–Al based high-entropy alloys were investigated by decreasing the Al content and increasing the Ag ratio, and their gamma-ray shielding parameters were analyzed in detail. The mass attenuation coefficients (Formula presented.) were calculated in the photon energy range of 0.015–15 MeV using the EpiXS, WinXCom, and Phy-X/PSD programs, and the results were compared with each other. The findings indicate that, in the low-energy range, the mass attenuation coefficient values are high due to the photoelectric effect, and distinct K-absorption edges appear in the alloys with increasing Ag content. For example, at 0.015 MeV photon energy, the mass attenuation coefficient was approximately 44.8 cm2/g for alloys with low Ag content, while it increased to about 46.5 cm2/g for alloys with higher Ag content. In addition, the half-value layer ((Formula presented.)) and mean free path (MFP, cm) values decreased as the Ag content increased, indicating that effective shielding can be achieved with thinner samples. The effective atomic number (Zeff) and exposure buildup factors (EBF) were also analyzed, demonstrating the positive effect of Ag addition on the shielding performance. Overall, the obtained results indicate that Ag incorporation enhances the gamma-ray shielding capability of HEAs, suggesting that these materials have higher potential compared to conventional shielding materials used in nuclear technologies.