Evidence of annealing-induced transformation of CO 2 - radicals in irradiated tooth enamel

Results of EPR study on the series of γ -irradiated and thermally treated tooth enamel plates are presented and discussed. The analysis of EPR lineshape variation shows that the thermal annealing causes the transformation of orthorhombic CO 2 - radicals into axial ones. Possible models of this trans...

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Veröffentlicht in:	Radiation measurements 2006-05, Vol.41 (5), p.577-581
Hauptverfasser:	Vorona, I.P., Ishchenko, S.S., Baran, N.P., Petrenko, T.L., Rudko, V.V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics EPR EPR dating Exact sciences and technology Geochronology Isotope geochemistry. Geochronology Pollution, environment geology Radiation defect Retrospective dosimetry Tooth enamel
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Beschreibung
Zusammenfassung:	Results of EPR study on the series of γ -irradiated and thermally treated tooth enamel plates are presented and discussed. The analysis of EPR lineshape variation shows that the thermal annealing causes the transformation of orthorhombic CO 2 - radicals into axial ones. Possible models of this transformation are discussed in details. Conclusion is made that the most plausible explanation of the radicals transformation can obtained under condition that both types of CO 2 - radicals are located in identical structural positions, namely in a position B (substitution of phosphorus by carbon).
ISSN:	1350-4487 1879-0925
DOI:	10.1016/j.radmeas.2005.12.002