Geographic Variations in the EPR Spectrum of Tooth Enamel

The presence of stable radiation-induced radicals in the mineral component of tooth enamel allows use of this material as a biological dosemeter. Estimation of the dose absorbed in tooth enamel can be done by EPR. Generally, for the purpose of dose reconstruction, the EPR spectrum of tooth enamel is...

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Bibliographic Details
Published in:Radiation protection dosimetry 1999-01, Vol.84 (1-4), p.445-449
Main Authors: Romanyukha, A.A., Hayes, R.B., Haskell, E.H., Kenner, G.H.
Format: Article
Language:English
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Summary:The presence of stable radiation-induced radicals in the mineral component of tooth enamel allows use of this material as a biological dosemeter. Estimation of the dose absorbed in tooth enamel can be done by EPR. Generally, for the purpose of dose reconstruction, the EPR spectrum of tooth enamel is interpreted in terms of two main components. The first is a broad background signal often called the native signal centered at a g value of 2.0045. The origin of this signal is not precisely known. The second main component in the tooth enamel spectrum (g- = 2.0018, g¦ = 1.9985) is purely radiation induced and can be used for retrospective dosimetry. Internal structure of the native signal and variations of its amplitude and linewidth were investigated for the samples prepared from modern teeth obtained from different geographic locations (USA and Russia). Possible reasons for the variations observed are discussed as are the potential effects of the variations on the reliability of dose estimation.
ISSN:0144-8420
1742-3406
DOI:10.1093/oxfordjournals.rpd.a032774