EPR spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis
In order to determine the components which give rise to the EPR spectrum around g = 2 we have applied Maximum Likelihood Common Factor Analysis (MLCFA) on the EPR spectra of enamel sample 1126 which has previously been analysed by continuous wave and pulsed EPR as well as EPR microscopy. MLCFA yield...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/89994 2024-01-14T10:06:07+01:00 EPR spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis Vanhaelewyn, G Callens, F Grun, Rainer http://hdl.handle.net/1885/89994 https://doi.org/10.1016/S0969-8043(00)00090-7 https://openresearch-repository.anu.edu.au/bitstream/1885/89994/5/01_Vanhaelewyn_EPR_spectrum_deconvolution_and_2000.pdf.jpg unknown Pergamon-Elsevier Ltd 0969-8043 http://hdl.handle.net/1885/89994 doi:10.1016/S0969-8043(00)00090-7 https://openresearch-repository.anu.edu.au/bitstream/1885/89994/5/01_Vanhaelewyn_EPR_spectrum_deconvolution_and_2000.pdf.jpg Applied Radiation and Isotopes Keywords: carbonic acid free radical sulfate conference paper controlled study dose response dosimetry electron spin resonance enamel factorial analysis fossil mathematical model maximum likelihood method priority journal sample spectrum tooth Anim Journal article ftanucanberra https://doi.org/10.1016/S0969-8043(00)00090-7 2023-12-15T09:38:11Z In order to determine the components which give rise to the EPR spectrum around g = 2 we have applied Maximum Likelihood Common Factor Analysis (MLCFA) on the EPR spectra of enamel sample 1126 which has previously been analysed by continuous wave and pulsed EPR as well as EPR microscopy. MLCFA yielded agreeing results on three sets of X-band spectra and the following components were identified: an orthorhombic component attributed to CO-2, an axial component (CO3-3), as well as four isotropic components, three of which could be attributed to SO-2, a tumbling CO-2 and a central line of a dimethyl radical. The X-band results were confirmed by analysis of Q-band spectra where three additional isotropic lines were found, however, these three components could not be attributed to known radicals. The orthorhombic component was used to establish dose response curves for the assessment of the past radiation dose, D(E). The results appear to be more reliable than those based on conventional peak-to-peak EPR intensity measurements or simple Gaussian deconvolution methods. Article in Journal/Newspaper Carbonic acid Australian National University: ANU Digital Collections Applied Radiation and Isotopes 52 5 1317 1326 |
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Australian National University: ANU Digital Collections |
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Keywords: carbonic acid free radical sulfate conference paper controlled study dose response dosimetry electron spin resonance enamel factorial analysis fossil mathematical model maximum likelihood method priority journal sample spectrum tooth Anim |
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Keywords: carbonic acid free radical sulfate conference paper controlled study dose response dosimetry electron spin resonance enamel factorial analysis fossil mathematical model maximum likelihood method priority journal sample spectrum tooth Anim Vanhaelewyn, G Callens, F Grun, Rainer EPR spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis |
topic_facet |
Keywords: carbonic acid free radical sulfate conference paper controlled study dose response dosimetry electron spin resonance enamel factorial analysis fossil mathematical model maximum likelihood method priority journal sample spectrum tooth Anim |
description |
In order to determine the components which give rise to the EPR spectrum around g = 2 we have applied Maximum Likelihood Common Factor Analysis (MLCFA) on the EPR spectra of enamel sample 1126 which has previously been analysed by continuous wave and pulsed EPR as well as EPR microscopy. MLCFA yielded agreeing results on three sets of X-band spectra and the following components were identified: an orthorhombic component attributed to CO-2, an axial component (CO3-3), as well as four isotropic components, three of which could be attributed to SO-2, a tumbling CO-2 and a central line of a dimethyl radical. The X-band results were confirmed by analysis of Q-band spectra where three additional isotropic lines were found, however, these three components could not be attributed to known radicals. The orthorhombic component was used to establish dose response curves for the assessment of the past radiation dose, D(E). The results appear to be more reliable than those based on conventional peak-to-peak EPR intensity measurements or simple Gaussian deconvolution methods. |
format |
Article in Journal/Newspaper |
author |
Vanhaelewyn, G Callens, F Grun, Rainer |
author_facet |
Vanhaelewyn, G Callens, F Grun, Rainer |
author_sort |
Vanhaelewyn, G |
title |
EPR spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis |
title_short |
EPR spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis |
title_full |
EPR spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis |
title_fullStr |
EPR spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis |
title_full_unstemmed |
EPR spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis |
title_sort |
epr spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis |
publisher |
Pergamon-Elsevier Ltd |
url |
http://hdl.handle.net/1885/89994 https://doi.org/10.1016/S0969-8043(00)00090-7 https://openresearch-repository.anu.edu.au/bitstream/1885/89994/5/01_Vanhaelewyn_EPR_spectrum_deconvolution_and_2000.pdf.jpg |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Applied Radiation and Isotopes |
op_relation |
0969-8043 http://hdl.handle.net/1885/89994 doi:10.1016/S0969-8043(00)00090-7 https://openresearch-repository.anu.edu.au/bitstream/1885/89994/5/01_Vanhaelewyn_EPR_spectrum_deconvolution_and_2000.pdf.jpg |
op_doi |
https://doi.org/10.1016/S0969-8043(00)00090-7 |
container_title |
Applied Radiation and Isotopes |
container_volume |
52 |
container_issue |
5 |
container_start_page |
1317 |
op_container_end_page |
1326 |
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1788060437762277376 |