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Multifrequency EPR study of carbonate- and sulfate-derived radicals produced by radiation in shells and corallite
Strzelczak, G.; Vanhaelewyn, G.; Stachowicz, W.; Goovaerts, E.; Callens, F.; Michalik, J. (2001). Multifrequency EPR study of carbonate- and sulfate-derived radicals produced by radiation in shells and corallite. Radiation Research 155(4): 619-624. https://dx.doi.org/10.1667/0033-7587(2001)155[0619:MESOCA]2.0.CO;2
In: Radiation Research. ISSN 0033-7587; e-ISSN 1938-5404, meer
Peer reviewed article  
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  • Strzelczak, G.
  • Vanhaelewyn, G.
  • Stachowicz, W.
  • Goovaerts, E.
  • Callens, F.
  • Michalik, J.
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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