The effect of thermal treatment on radiation-induced EPR signals in tooth enamel

The effect of thermal treatment on the radiation-induced EPR spectrum of tooth enamel was studied. Annealing before sample irradiation was found to increase enamel radiation sensitivity by more than 40%. Depending on the annealing conditions the EPR signals of three supplementary radiation radicals...

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Bibliographic Details
Published in:Radiation measurements 2005-02, Vol.39 (2), p.137-141
Main Authors: Vorona, I.P., Ishchenko, S.S., Baran, N.P.
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
EPR
EPR dating
Exact sciences and technology
Geochronology
Isotope geochemistry. Geochronology
NATURAL SCIENCES
NATURVETENSKAP
Paleontology
Radiation defect
Retrospective dosimetry
Tooth enamel
Vertebrate paleontology
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Summary:The effect of thermal treatment on the radiation-induced EPR spectrum of tooth enamel was studied. Annealing before sample irradiation was found to increase enamel radiation sensitivity by more than 40%. Depending on the annealing conditions the EPR signals of three supplementary radiation radicals were observed in addition to the main signal caused by CO 2 − radicals. It was found that the presence of these signals in the enamel EPR spectra provides evidence of sample annealing. The possibility of obtaining information about sample history by studying the additional EPR signals is discussed. It can be important to EPR dating and EPR dosimetry.
ISSN:1350-4487
1879-0925
1879-0925
DOI:10.1016/j.radmeas.2004.03.020