Akademik Veri Yönetim Sistemi
Spectroscopy Letters, 2026 (SCI-Expanded, Scopus)
High-entropy alloys (HEAs) have emerged as a new class of advanced materials due to their superior mechanical strength, thermal stability, and radiation resistance arising from their multi-component structures. In this study, six different HEAs belonging to the Zr–Ti–Al–Mo–Nb alloy system, with decreasing Al content and increasing Mo content (coded as H1-H6), were investigated, and their gamma-ray shielding parameters were analyzed in detail. Evaluating the fundamental parameters derived from the mass attenuation coefficient (MAC) and linear attenuation coefficient (LAC) of these materials, which reduce radiation intensity, is of great importance for determining their shielding potential. In this context, the mass attenuation coefficients were calculated in the photon energy range of 0.015 to 15 MeV using three different computational programs: EpiXS, WinXCOM, and Phy-X/PSD. As shown in the tables, the results obtained from these programs exhibited a high level of agreement. The results show that with increasing Mo content, in the low-energy region where the photoelectric effect is dominant, for example, at 30 keV, the MAC(μ/ρ) increases from 22.039 cm2/g to 23.484 cm2/g. In addition, the decrease in the half-value layer (HVL) and mean free path (MFP) values indicates that effective radiation shielding can be achieved with thinner material thicknesses. Furthermore, the analyses of the effective atomic number (Zeff) and exposure buildup factor (EBF) also support the positive influence of Mo addition on the shielding performance. Overall, the findings reveal that the H6 alloy, which contains the highest Mo content, exhibits superior gamma-ray shielding capability. This result indicates that the Mo-rich alloy has significant potential as a radiation shielding material. Moreover, the investigated alloys demonstrate effective shielding performance when compared with some MAC values reported in the literature.