Koseoglu, RKoksal, F2019-08-012019-08-0120030969-8043https://dx.doi.org/10.1016/S0969-8043(03)00124-6https://hdl.handle.net/11480/5705Gamma-irradiated seasnail (from family of Helix lukortium) hard tissues (CaCO3) were investigated by electron paramagnetic resonance (EPR) at room temperature. The radicals produced by gamma-irradiation in seasnail were attributed to orthorhombic C-. O-2(-), freely rotating C-. O-2(-), orthorhombic C-. O-3(-), axial C-. O-3(-), and axial C-. O-3(3-) free radicals. Unirradiated seasnail hard tissues also feature Mn2+ ions in their EPR spectra. The hyperfine values were determined for the C-13 nucleus in the orthorhombic C-. O-2(-) and axial C-. O-3(3-) 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. (C) 2003 Elsevier Ltd. All rights reserved.eninfo:eu-repo/semantics/closedAccessfree radicalsgamma-irradiationsnailEPRelectron paramagnetic resonanceMn2+Article591737710.1016/S0969-8043(03)00124-6128781262-s2.0-0142026848Q3WOS:000184769100012Q2