Detection of free radicals in γ-irradiated seasnail hard tissues by electron paramagnetic resonance

Gamma-irradiated seasnail (from family of Helix lukortium) hard tissues (CaCO3) were investigated by electron paramagnetic resonance (EPR) at room temperature. The radicals produced by γ-irradiation in seasnail were attributed to orthorhombic image, freely rotating image, orthorhombic image, axial image, and axial image free radicals. Unirradiated seasnail hard tissues also feature Mn2+ ions in their EPR spectra. The hyperfine values were determined for the 13C nucleus in the orthorhombic image and axial image free radicals and for the manganese impurity ions. The g values of all the free radicals have been measured. The results were compared with the literature data for similar defects.