Abstract
In the present study, nanocomposites with different ratios of NiO and Co3O4 (x = 0.3, 0.5, and 0.7) have been prepared via microwave oven and characterized using XRD. FLUKA code has been used to estimate the values of the mass attenuation coefficient (μm) for all samples. From the measurement, we found that when the thickness of the samples increases, the gamma transmission values decrease. Besides, the μm values increase as the Co3O4 content increase from 0.3 to 0.7%. At selected photon energy, the HVL, TVL, and MFP values decrease with increasing Co3O4 concentrations. At low energies (0.1–0.5 MeV), the linear decreasing trend in MAC values indication that photoelectric effect (PEA) (∝1/E3.5) dominance over this region. Afterward, at medium energy regions (0.5–1.33 MeV), the decrements in MAC values are insignificant as the Compton scattering (CS) (∝1/E) phenomenon dominates. As a conclusion, CoNi3 has superior effectiveness as a shielding material.
Highlights
Nanotechnology develops a new branch for improving the properties of materials
The 0.7NiO/0.3Co3O4 NPs nanocomposites show eight peaks, which indi cated to NiO NPs [25,26] with 3 additional three peaks at the angle of 44, 52, and 76◦. These three peaks are related to 30 wt% Co3O4 NPs
0.7Co3O4 NPs as shown in Fig. 2, these distinguish peaks are shifted to angles of 32, 59, and 65◦
Summary
Nanotechnology develops a new branch for improving the properties of materials. In past days the investigation of nanoparticles has been performed by different researchers [1]. Nanomaterials are very attractive because of the very tiny size and high particular surface area and have a high possibility for beneficent material features like compressive strength and permeability [17] In this regard, the nanoparticle performs some spe cial tasks as a radiation shield; it could be reducing gamma. The study of gamma radiation shielding for NiO/xCo3O4 nanocomposites prepared samples is novel because there is no such study in the literature. The novelty of this study is the use of the FLUKA Monte Carlo code to evaluate the mass attenuation coefficient for NiO/xCo3O4 nanocomposites samples in the photon energy range from 0.1 to 1.33 MeV. FLUKA code was utilized to evaluate the shielding features of three samples of (1-x)NiO/ xCo3O4, where (x = 0.3, 0.5, and 0.7) nanocomposites against γ-rays. Photons passing through the sample have been detected in de tector volume
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