Study the Absorption and Attenuation Coefficient to a model of Spinel Ferrite (CoFe2O4) to absorb a spectrum from (X-Band) of the Microwaves before and after irradiate it with fast neutrons

Four samples of the chemical-grade ferrite material were irradiated with fast neutrons (Am-Be) 241 and at an energy rate of 5 MeV and neutron flux (ɸ = 6 ×107 n.cm−2 .s−1), knowing that these four models have been processed by four degrees of temperature (1250, 1200, 1150, 1100) oC. The absorption and attenuation tests for these four models before and after irradiation were performed for microwaves (X-band) of the frequency band (8-12 GHz) in the Network Analyzer and found that the absorbance, attenuation coefficient and impedance increased by increasing the temperature of the sintering before and after irradiation, the best values were for absorption and the attenuation coefficient and resistance were at the sintering temperature of T = 1250 oC and in state after irradiation. The results of irradiation showed that neutron irradiation significantly affected absorbance, as absorption and attenuation coefficient increased by increasing radiation dose.