A Report on Phase 1 of the 5th International Radiocarbon Intercomparison (VIRI)

Scott, E.M.; Cook, Gordon; Naysmith, Philip; Bryant, Charlotte; O'Donnell, David

doi:10.1017/s003382220004234x

Cited by 48 publications

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“…The Fifth International Radiocarbon Intercomparison (VIRI) continues the tradition of the TIRI (third) and FIRI (fourth) (Scott 2003) intercomparisons and operates in addition to any within-laboratory quality assurance measures as an independent check on laboratory procedures. VIRI is a phased intercomparison; results for the first phase, which employed grain samples, were reported in Scott et al (2007). The second phase, involving bone samples, is reported here.…”

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confidence: 99%

A Report on Phase 2 of the Fifth International Radiocarbon Intercomparison (VIRI)

2010

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ABSTRACT. The Fifth International Radiocarbon Intercomparison (VIRI) continues the tradition of the TIRI (third) and FIRI (fourth) (Scott 2003) intercomparisons and operates in addition to any within-laboratory quality assurance measures as an independent check on laboratory procedures. VIRI is a phased intercomparison; results for the first phase, which employed grain samples, were reported in Scott et al. (2007). The second phase, involving bone samples, is reported here. The third and final phase, which includes samples of peat, wood, and shell, has also been completed and a companion paper appears in these proceedings.Five bone samples were made available and included Sample E: mammoth bone (>5 half-lives); Sample F: horse bone (from Siberia, excavated in 2001; and Samples H and I: whale bones (approximately 2 half-lives). Sample G (human bone) was accessible only to accelerator mass spectrometry (AMS) laboratories because of the limited amount of sample available. More than 40 laboratories participated in Phase 2 and consensus values for the ages were as follows: Sample E = 39,305 14 C yr BP (standard deviation [1 ] = 121 yr); Sample F = 2513 yr BP (1  = 5 yr); Sample G = 969 yr BP (1  = 5 yr); Sample H = 9528 yr BP (1  = 7 yr); and Sample I = 8331 yr BP (1  = 6 yr). Sample G had previously been dated by 4 laboratories and a weighted mean of 934 ± 12 yr BP had been quoted. Sample I had previously been dated at 8335 ± 25 yr BP and Sample H had been dated at 9565 ± 130 yr BP. Results for Sample H and Sample I are in good agreement with the previous results; Sample G results, however, give a value that is significantly older than the previously reported results.

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A Report on Phase 2 of the Fifth International Radiocarbon Intercomparison (VIRI)

2010

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“…From the results shown in Table 2, it can be seen that there is a general good agreement between experimental and consensus values. Also, in the second set of samples of the VIRI exercise, the agreement is very good (Scott et al 2007(Scott et al , 2008. The first set of unknown samples measured at CNA consisted of 6 samples (CNA002 paper sample; CNA003-CNA007 parchment samples) from 5 different medieval manuscripts belonging to the University of Seville.…”

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confidence: 97%

Radiocarbon Measurement Program at the Centro Nacional de Aceleradores (CNA), Spain

2009

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ABSTRACT. In September 2005, an accelerator mass spectrometry (AMS) system based on a 1MV Tandetron accelerator arrived at the Centro Nacional de Aceleradores (CNA). One of the main research programs for this AMS facility is based on radiocarbon. At the same time as the AMS facility was installed and tested, the 14 C sample preparation laboratory was designed and set up. A graphitization line that allows the preparation of 5 samples in parallel was designed and built in October 2006. The first months were mainly dedicated to check and optimize all the sample processing. For such a task, several reference samples have been prepared and measured. Since the beginning of 2007, the laboratory has been fully operational and is currently performing as a service for the scientific community. During 2007, nearly 100 unknown samples were prepared and measured in our AMS system. Most of them were for dating purposes, but also other applications were investigated. The performance of the 14 C laboratory and dating service will be shown, with some examples as illustration.

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“…Alle vier Labore nehmen an laufenden Programmen zur internen Qualitätskontrolle und an internationalen Ringvergleichen teil (Scott 2003;Scott et al 2007;2010a-b).…”

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Die Zeit der großen Gräben: Modelle zur Chronologie des Michelsberger Fundplatzes von Heilbronn-Klingenberg „Schlossberg“, Stadtkreis Heilbronn, Baden-Württemberg

Seidel

Stephan

Stika

et al. 2016

Praehistorische Zeitschrift

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This paper presents an attempt to establish more precise dating of the Michelsberg enclosure of Klingenberg-Schlossberg in the Neckar valley. The approach used is advocated as the basis on which to explore the timing and duration of other Michelsberg enclosures of the later fifth–earlier fourth millennium cal BC. Excavated extensively in 1986–1987, the Klingenberg enclosure has two ditches across a loess promontory, traces of a palisade inside the inner ditch, remains of burnt superstructure in both ditches, numerous pits both inside and outside, and numerous dog remains. There are some signs of pre-enclosure occupation in the MK II and III/IV phases, but the bulk of activity belongs to the MK V/Munzingen phase. A formal chronological approach combines the detailed archaeological information from the excavation with radiocarbon dates on carefully selected samples, here mainly charred cereals or articulated or articulating animal bones, in a Bayesian statistical framework. No samples were found to date MK II activity. Samples for two MK III/IV pits suggest a date in the 40th–39thcenturies cal BC. MK V/Mz activity began at the very end of the 39thand the start of the 38thcentury cal BC. Unlike in the previously published interpretation of the sequence, this activity probably began with the construction of the enclosure, both ditches being dug either together or in very quick succession. This was followed by pits inside the enclosure, from the earlier 38thcentury cal BC. Probably after a few decades, pits began to be dug outside the enclosure, in the middle part of the 38thcentury cal BC. Both ditches probably went out of use in the mid-37thcentury cal BC, probably simultaneously, after the burning of the rampart between them, and the ending of the external pits could be of the same date; the internal pits might have continued a little longer. A duration of 120–150 years for MK V/Mz activity is estimated. Alternative models are considered. The local and wider implications of these formal date estimates are discussed, topics covered including the circumstances in which the enclosure may have been constructed and those in which it ended, the chronology of MK pottery, and the wider development of MK and other enclosures

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A Report on Phase 1 of the 5th International Radiocarbon Intercomparison (VIRI)

Cited by 48 publications

References 1 publication

A Report on Phase 2 of the Fifth International Radiocarbon Intercomparison (VIRI)

A Report on Phase 2 of the Fifth International Radiocarbon Intercomparison (VIRI)

Radiocarbon Measurement Program at the Centro Nacional de Aceleradores (CNA), Spain

Die Zeit der großen Gräben: Modelle zur Chronologie des Michelsberger Fundplatzes von Heilbronn-Klingenberg „Schlossberg“, Stadtkreis Heilbronn, Baden-Württemberg

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