Hostname: page-component-848d4c4894-x24gv Total loading time: 0 Render date: 2024-05-11T15:16:44.328Z Has data issue: false hasContentIssue false
  • English
  • Français

National Physical Laboratory Radiocarbon Measurements II

Published online by Cambridge University Press:  18 July 2016

W. J. Callow ,
M. J. Baker  and
Daphne H. Pritchard
W. J. Callow
Affiliation:
National Physical Laboratory, Teddington, England
M. J. Baker
Affiliation:
National Physical Laboratory, Teddington, England
Daphne H. Pritchard
Affiliation:
National Physical Laboratory, Teddington, England
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The following list comprises measurements made since those reported in NPL I and is complete to the end of November 1963.

Ages are relative to a.d. 1950 and are calculated using a half-life of 5568 yr. The measurements have been corrected for fractionation and referred to 0.950 times the activity of the NBS oxalic acid as a contemporary reference standard. The quoted uncertainty is one standard deviation derived from a proper combination of the parameter variances, viz. those of the standard and background measurements over a rolling twenty-week period, of the sample measurements from at least three independent fillings, of the δC13 measurements and of the de Vries effect (assumed to add an additional uncertainty equivalent to a standard deviation of 80 yr). Any uncertainty in the half-life has been excluded so that relative C14 ages may be correctly compared. Absolute age assessments, however, should be made using the accepted best value for the half-life and the appropriate uncertainty included. If the net sample activity is less than 4 times the standard error of the difference between the sample and background activities, a lower limit to the age is reported equivalent to a sample activity of 4 times the standard error of this difference.

The description of each sample is based on information provided by the person submitting the sample to the Laboratory.

The work reported forms part of the research programme of the Laboratory and is published by permission of the Director.

Type
Research Article
Information
Radiocarbon , Volume 6 , 1964 , pp. 25 - 30
Copyright
Copyright © The American Journal of Science 

References

Date lists: Google Scholar
New Zealand I-V Grant-Taylor, and Rafter, , 1962.Google Scholar
NPL I Callow, , Baker, and Pritchard, , 1962.Google Scholar
Callow, W. J., Baker, M. J., and Pritchard, D. H., 1962, National Physical Laboratory radiocarbon measurements I: Radiocarbon, v. 5, p. 34–38.Google Scholar
Grant-Taylor, T., and Rafter, T. A., 1962, New Zealand natural radiocarbon measurements I-V: Radiocarbon, v. 5, p. 118–162.Google Scholar
Green, R. D., and Askew, P. W., 1959, Report Soil Survey Research Board, no. 11, p. 22–27.Google Scholar
Hafsten, U., 1960, Pleistocene development of vegetation and climate in Tristan da Cunha and Gough Island : Arbok Univ. i Bergen mat.—Naturv., no. 20, 48 p., 8 pl. Google Scholar
Milner, H. B., and Bull, A. J., 1925, Excursion to Eastbourne and Hastings: Proc. Geol. Assoc., v. 36, p. 291–320.Google Scholar
Morrison, M. E. S., 1961, Pollen analysis in Uganda: Nature, v. 190, no. 4775, p. 483–486.Google Scholar
Mulvaney, D. J., 1960, Archaeological Excavations at Fromm's Landing on the Lower Murray River: Royal Soc. Victoria Proc., v. 72, p. 53–85.Google Scholar
Mulvaney, D. J. 1961, Australian Radio-Carbon Dates: Antiquity, v. 35, p. 37–39.Google Scholar
Steers, J. A., 1948, The Coastline of England and Wales: Cambridge, Univ. Press.Google Scholar