| Some recent multi-frequency electron paramagnetic resonance results on systems relevant for dosimetry and dating. | |
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MedLine Citation:
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PMID: 11993479 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Electron Paramagnetic Resonance (EPR) applications like e.g. EPR dosimetry and dating, are usually performed at X-band frequencies because of practical reasons (cost, sample size, etc.). However, it is increasingly recognized that the radiation-induced EPR signals are strongly composite, what might affect dose/age estimates. A few recent examples from both the dosimetry and dating field, illustrating the problems, will be presented. The involved spectra are mainly due to carbonate-derived radicals (CO2-, CO3(3-), etc.). Measurements at higher microwave frequencies are often recommended to improve the insight into the spectra and/or the practical signal quantification. Recent results at Q- and W-band frequencies will show that a multi-frequency approach indeed opens many interesting perspectives in this field but also that each frequency may have specific (dis)advantages depending on the EPR probe and application involved. The discussion will concern carbonate-containing apatite single crystals, shells, modern and fossil tooth enamel. |
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Authors:
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F Callens; G Vanhaelewyn; P Matthys |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Volume: 58 ISSN: 1386-1425 ISO Abbreviation: Spectrochim Acta A Mol Biomol Spectrosc Publication Date: 2002 Apr |
Date Detail:
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Created Date: 2002-05-07 Completed Date: 2002-12-11 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9602533 Medline TA: Spectrochim Acta A Mol Biomol Spectrosc Country: England |
Other Details:
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Languages: eng Pagination: 1321-8 Citation Subset: IM |
Affiliation:
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Department of Solid State Sciences, Ghent University, Gent, Belgium. freddy.callens@rug.ac.be |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Carbon Isotopes
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chemistry Carbonates / chemistry Dose-Response Relationship, Radiation Durapatite / analysis, chemistry Electron Spin Resonance Spectroscopy / methods* Humans Magnetics Microwaves Models, Molecular Radiometry* Temperature Tooth X-Rays |
| Chemical | |
Reg. No./Substance:
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0/Carbon Isotopes; 0/Carbonates; 1306-06-5/Durapatite |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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