Journal article
Decomposition of the angular ESR spectra of fossil tooth enamel fragments
Radiation Measurements, Vol.45(8), pp.887-898
2010
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Source: InCites
Abstract
<p><p id="x-x-">The ESR spectra of a fragment of fossil tooth enamel were measured by rotating it in 10° increments over 360° around its three major axes. We used an automated simulated annealing (SA) procedure for the mathematical decomposition of the spectra. The SA approach is particularly robust in finding global solutions rather than getting stuck in local minima. All angular measurements could be fitted with four Gaussian lines, all of which could be attributed to components of CO<sub>2</sub><sup>−</sup> radicals. The results imply that the tooth enamel fragment contains at least two different types of oriented CO<sub>2</sub><sup>−</sup> radicals, plus about 9% of non-oriented CO<sub>2</sub><sup>−</sup> radicals. The oriented components were tentatively attributed to axial and orthorhombic CO<sub>2</sub><sup>−</sup> radicals. Their explicit locations in the crystal domains of the tooth enamel remain unresolved. <h2 id="x-x-kwd_1"> </h2></p>
Details
- Title
- Decomposition of the angular ESR spectra of fossil tooth enamel fragments
- Creators
- Renaud Joannes-Boyau - Australian National UniversityThomas Bodin - Australian National UniversityRainer Grun - Australian National University
- Publication Details
- Radiation Measurements, Vol.45(8), pp.887-898
- Identifiers
- 1089; 991012822069302368
- Academic Unit
- Southern Cross GeoScience; Faculty of Science and Engineering; Science
- Resource Type
- Journal article