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dc.contributor.authorBartz, Melanie
dc.contributor.authorArnold, Lee J
dc.contributor.authorSpooner, Nigel A
dc.contributor.authorDemuro, Martina
dc.contributor.authorCampana, Isidoro
dc.contributor.authorRixhon, Gilles
dc.contributor.authorBrueckner, Helmut
dc.contributor.authorDuval, Mathieu
dc.date.accessioned2020-04-16T22:52:31Z
dc.date.available2020-04-16T22:52:31Z
dc.date.issued2019
dc.identifier.issn2045-2322
dc.identifier.doi10.1038/s41598-019-54688-9
dc.identifier.urihttp://hdl.handle.net/10072/393156
dc.description.abstractWe present the first experimental evaluation of the alpha efficiency value for electron spin resonance (ESR) dating of coarse quartz grains, which is used for the evaluation of the internal and external alpha dose rate components. Based on our results, we recommend the use of an a-value of 0.07 ± 0.01 (1σ) for both the Al and Ti centres. Although we acknowledge that quartz ESR alpha efficiency may be sample dependent, and could also be impacted by other sources of uncertainty, this potential variability is presently impossible to evaluate given the absence of other experimental a-values available in the ESR dating literature. Measured radioactivity of quartz grains from the Moulouya catchment (NE Morocco) provides an internal dose rate in the range of 50–70 µGy/a when using an a-value of 0.07. The use of this empirically derived a-value for the evaluation of the internal and external alpha dose rate has a limited overall impact on the final ESR age results: they change by <2% and <3%, respectively, in comparison with those obtained with an assumed a-value. However, the large variability observed among the broader sample dataset for quartz internal radioactivity and hydrofluoric acid (HF) etching rates underscores the potential importance of undertaking experimental evaluations of alpha dose rate parameters for each dated sample.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherNature Publishing Group
dc.relation.ispartofissue1
dc.relation.ispartofjournalScientific Reports
dc.relation.ispartofvolume9
dc.subject.fieldofresearchBiochemistry and Cell Biology
dc.subject.fieldofresearchOther Physical Sciences
dc.subject.fieldofresearchcode0601
dc.subject.fieldofresearchcode0299
dc.subject.keywordsScience & Technology
dc.subject.keywordsMultidisciplinary Sciences
dc.subject.keywordsScience & Technology - Other Topics
dc.subject.keywordsELECTRON-SPIN-RESONANCE
dc.subject.keywordsLOWER MOULOUYA RIVER
dc.titleFirst experimental evaluation of the alpha efficiency in coarse-grained quartz for ESR dating purposes: implications for dose rate evaluation
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationBartz, M; Arnold, LJ; Spooner, NA; Demuro, M; Campana, I; Rixhon, G; Brueckner, H; Duval, M, First experimental evaluation of the alpha efficiency in coarse-grained quartz for ESR dating purposes: implications for dose rate evaluation, Scientific Reports, 2019, 9 (1)
dcterms.dateAccepted2019-11-09
dcterms.licensehttp://creativecommons.org/licenses/by/4.0/
dc.date.updated2020-04-16T22:46:22Z
dc.description.versionVersion of Record (VoR)
gro.rights.copyright© The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
gro.hasfulltextFull Text
gro.griffith.authorDuval, Mathieu


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