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An Interim Progress Report on Stages 1 and 2 of the International Collaborative Program

  • E M Scott (a1), T C Aitchison (a2), D D Harkness (a1), M S Baxter (a2) and G T Cook (a2)...

Abstract

We report in this paper on a preliminary analysis of Stages 1 and 2 of the International Collaborative program. We have chosen to concentrate on the internal and external consistencies of the participating laboratories. The two stages so far completed have dealt only with the processes of sample synthesis and counting, and results indicate that the major component of variability lies in the counting process. Outlying laboratories are observed at each stage. A third stage is in progress which will allow an assessment of any further variability due to sample pretreatment. With the inclusion of duplicate samples in each stage, we are able to report that laboratories are remarkably consistent internally, ie, the differences between duplicates generally agree with the laboratory's claimed precision.

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Copyright

References

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Harkness, DD, Cook, GT, Miller, BF, Scott, EM and Baxter, MS, 1989, Design and preparation of samples for the International Collaborative Study: Radiocarbon, this issue.
International Study Group, 1982, An inter-laboratory comparison of radiocarbon measurements in tree rings: Nature, v 298 p 619623.
International Study Group, 1983, An international tree-ring replicate study, in Internatl symposium, 14C and archaeology, 1st, Proc: Strasbourg, PACT 8, p 123133.
Otlet, RL, Walker, AJ, Hewson, AD and Burleigh, R, 1980, 14C interlaboratory comparisons in the UK: Experiment design preparation and preliminary results, in Stuiver, M and Kra, RS, eds, Internatl 14C conf, 10th, Proc: Radiocarbon, v 22 no. 3, p 936946.
Pearson, GW, Pilcher, JR, Baillie, MGL, Corbett, DM and Qua, F, 1986, High precision 14C measurement of Irish oaks to show the natural 14C variations from AD 1840 to 5210 bc, in Stuiver, M and Kra, RS, eds, Internatl 14C conf, 12th, Proc: Radiocarbon, v 28 no. 2B, p 911934.
Scott, EM, 1989, Report on the Workshop on the International Collaborative Study: Radiocarbon, this issue.
Scott, EM, Baxter, MS, Aitchison, TC, Harkness, DD and Cook, GT, 1986, Announcement of a new collaborative study for intercalibration of 14C dating laboratories: Radiocarbon, v 28, no. 1, p 167169.
Scott, EM, Baxter, MS, Harkness, DD, Aitchison, TC and Cook, GT, in press, Recent progress in the International Calibration of Radiocarbon Laboratories, in Internatl symposium, Archaeology and 14C, 2nd, Proc: PACT.

An Interim Progress Report on Stages 1 and 2 of the International Collaborative Program

  • E M Scott (a1), T C Aitchison (a2), D D Harkness (a1), M S Baxter (a2) and G T Cook (a2)...

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