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A detailed description of the structural and gamma ray shielding parameters of various spinel ferrite nanocrystals.

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This work represents the study of mass attenuation coefficient, total atomic cross section, total electronic cross section, effective atomic number, effective electron density and half value layer for selected three polymers : Polyacetylene (C2H2n), Polyethelyne (C2H4n), Polypyrrole (C4H5n) seven Saturated fatty Acids : Arachidiec Acids (C20H32O2), Capric Acid (C10H20O2), Caprylic Acid (C8H16O2), Cerotic Acid (C26H52O2), Lauric Acid (C12H24O2), Myristic Acid(C14H28O2), Plamatic Acid(C16H32O2) and Six Unsaturated fatty Acids : Arachidonic Acid (C20H32O2), Decosahexaaenic Acid (C22H32O2), Eliadic Acid (C18H34O2), Lenoleic Acid (C18H32O2), Erucic Acid (C22H42O2), Oleic Acid(C18H34O2) using NIST-XCOM and Geant4 Monte-Carlo simulation at the energy range 122 keV to 1330keV. Successfully designed narrow beam geometry in Geant4 code for low energy electromagnetic interaction study. We found the errors within 0.001% in the determined results of mass attenuation coefficient and showed Geant4 isa powerful toolkit for measurement of radiation interaction parameter with matter. The variation in effective atomic number and effective electron density with incident photon energy were observed due to the prevalence of photon interaction processes. The Monte-Carlo simulations and theoretical simulation results have been showed that the polymers have good shielding properties as compared with saturated and unsaturated fatty acids. From obtained results, it was noticed that Geant4 Monte-Carlois in good accord XCOM database.