Abstract
The effect of 5 keV, 200 μm/cm2 nitrogen ion irradiation on the structural, surface morphology, and shielding of lead doped cadmium ferrite nanocomposites are studied using XRD, SEM, TEM and EDX technics. The crystal size decreases after ion irradiation and EDX was used to obtain details of the doped nitrogen atom in the sample. The shielding characteristics of irradiated and unirradiated spinel ferrite samples are investigated for gamma ray radiation shielding using 60Co and 137Cs sources and an HPGe detector. Linear attenuation (μ, cm−1) Mass attenuation coefficients (μ/ρ, cm2/g), and half-value layer (HVL, cm) were determined at different photon energies, and have been measured experimentally and modelled using the MicroShield program. Good agreement was obtained between experimental and modeling results for the irradiated samples. Neutron macroscopic cross section was also calculated for the prepared samples before and after nitrogen ion irradiation. Results showed that the mass attenuation coefficient and other shielding parameters depend upon the nitrogen ion beam irradiation, and highly increased shielding properties nearly twice it's value of unirradiated samples against gamma rays as well as fast neutrons.
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