Multifrequency EPR study of carbonate- and sulfate-derived radicals produced by radiation in shells and corallite
In: Radiation Research. ISSN 0033-7587; e-ISSN 1938-5404, more
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| Authors | | Top |
- Strzelczak, G.
- Vanhaelewyn, G.
- Stachowicz, W.
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- Goovaerts, E.
- Callens, F.
- Michalik, J.
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| Abstract |
Shells of two sea mollusks (Venus sp.), pearl oyster (Meleagrina vulgaris) and corallite (white coral) were exposed to ionizing radiation (γ and X rays) and then examined by EPR spectroscopy in X, Q and W band. The resulting spectra were analyzed and the g values of the EPR lines in the multicomponent spectra were determined. The increased resolution in Q- and W-band spectra allowed us to assign the observed lines to CO2– ion radicals (isotropic and orthorhombic), SO2– isotropic, SO3– (isotropic and axial), and Mn2+ species. The assignments were confirmed by simulations of the spectra. Practical implications for the use of Q and/or W band in low-dose quantitative EPR measurements for dating and for accidental dose estimation are discussed. |
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