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dc.contributor.authorAitchison, T. C.
dc.contributor.authorScott, E. Marian
dc.contributor.authorHarkness, D. D.
dc.contributor.authorBaxter, M. S.
dc.contributor.authorCook, G. T.
dc.date.accessioned2021-02-11T20:15:27Z
dc.date.available2021-02-11T20:15:27Z
dc.date.issued1990-01-01
dc.identifier.citationAitchison, T. C., Scott, E. M., Harkness, D. D., Baxter, M. S., & Cook, G. (1990). Report on Stage 3 of the international collaborative program. Radiocarbon, 32(3), 271-278.
dc.identifier.issn0033-8222
dc.identifier.doi10.1017/S003382220001287X
dc.identifier.urihttp://hdl.handle.net/10150/653111
dc.descriptionFrom the International Workshop on Intercomparison of Radiocarbon Laboratories.
dc.description.abstractThis report on the third and final stage of the International Collaborative Program concentrates on the analysis of internal and external variability of 14C dates obtained from samples involved in the full 14C dating process. Thirty-eight laboratories took part in this stage with most producing 8 14C dates from 3 sets of duplicate material (eg, wood, shell and peat) and 2 single samples of wood of known ages 190 yr BP apart. From the 3 sets of duplicates for each laboratory, the internal precision of most laboratories was adequate; 6 labs grossly underestimated their internal reproducibility. From the 14C determinations from the 5 distinct samples for each laboratory, we discovered significant systematic biases, often greater than 100 years, in 15 laboratories and even accounting for bias, 12 laboratories had significantly greater external variability than explained by their quoted errors. In total, 23 out of the 38 laboratories in this stage of the study, FAILED to meet these 3 basic criteria for an adequate performance in the production of 14C dates.
dc.language.isoen
dc.publisherDepartment of Geosciences, The University of Arizona
dc.relation.urlhttp://radiocarbon.webhost.uits.arizona.edu/
dc.rightsCopyright © by the Arizona Board of Regents on behalf of the University of Arizona. All rights reserved.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectreliability
dc.subjectstatistical analysis
dc.subjectaccuracy
dc.subjectvariations
dc.subjectsamples
dc.subjectstandard materials
dc.subjectsampling
dc.subjectinterlaboratory comparison
dc.subjectanalysis
dc.subjecterrors
dc.subjecttechniques
dc.subjectpeat
dc.subjectorganic residues
dc.subjectsediments
dc.subjectwood
dc.subjectC 14
dc.subjectcarbon
dc.subjectdates
dc.subjectisotopes
dc.subjectradioactive isotopes
dc.subjectshells
dc.subjectabsolute age
dc.titleReport on Stage 3 of the International Collaborative Program
dc.typeProceedings
dc.typetext
dc.identifier.journalRadiocarbon
dc.description.noteThis material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.
dc.description.collectioninformationThe Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform February 2021
dc.source.volume32
dc.source.issue3
dc.source.beginpage271
dc.source.endpage278
refterms.dateFOA2021-02-11T20:15:27Z


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