Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-27T12:03:17.205Z Has data issue: false hasContentIssue false
  • English
  • Français

British Museum Natural Radiocarbon Measurements V

Published online by Cambridge University Press:  18 July 2016

Harold Barker  and
John Mackey
Harold Barker
Affiliation:
Research Laboratory, British Museum, London W.C. 1
John Mackey
Affiliation:
Research Laboratory, British Museum, London W.C. 1
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 dates detailed below are based on measurements made from September 1962 to August 1964. Work was often seriously interrupted due to difficulties with electronic equipment and also, from the late summer of 1963, high levels of tritium in the local water supplies used in the synthesis of acetylene (from nuclear weapons tests) made it difficult to obtain accurate measurements with acetylene as a filling gas for the proportional counter. The gas preparation equipment was therefore modified for the preparation of high purity CO2, and from Sample BM-165 onwards, the proportional counter was operated with CO2 as the filling gas at a pressure of 210 cm Hg at 22°C. instead of 140 cm Hg pressure of acetylene at 22°C. as reported previously (British Museum I). Background and net modern count rates under these conditions are 3.59 c.p.m. and 8.35 c.p.m., respectively. (In practice these values are taken as the rolling mean of the past 20 weeks’ measurements and are very constant.) The calculations of age are based on the half-life of 5570 yr and error terms are widened to include contributions of ± 80 yr for possible isotopic fractionation effects and ± 100 yr for de Vries-effects. Safeguards against inaccuracies are as described previously (British Museum I).

Type
Research Article
Information
Radiocarbon , Volume 10 , Issue 1 , 1968 , pp. 1 - 7
Copyright
Copyright © The American Journal of Science 

References

British Museum I Barker, and Mackey, , 1959 Google Scholar
British Museum II Barker, and Mackey, , 1960 Google Scholar
British Museum III Barker, and Mackey, , 1961 Google Scholar
British Museum IV Barker, and Mackey, , 1963 Google Scholar
Pennsylvania VI Stuckenrath, Jr., 1963 Google Scholar
UCLA II Fergusson, and Libby, , 1963 Google Scholar
Ashbee, P., 1958, The Fussells Lodge Long Barrow: Antiquity, v. 32, p. 106–111.Google Scholar
Ashbee, P. 1964, The radiocarbon dating of the Fussells Lodge Long Barrow: Antiquity, v. 38, p. 139–140.Google Scholar
Barker, Harold and Mackey, C. J., 1959, British Museum Natural Radiocarbon Measurements I: Am. Jour. Sci. Radioc. Supp., v. 1, p. 81–86.Google Scholar
Barker, Harold and Mackey, C. J. 1960, British Museum Natural Radiocarbon Measurements II: Am. Jour. Sci. Radioc. Supp., v. 2, p. 26–30.Google Scholar
Barker, Harold and Mackey, C. J. 1961, British Museum Natural Radiocarbon Measurements III: Radiocarbon, v. 3, p. 39–45.Google Scholar
Barker, Harold and Mackey, C. J. 1963, British Museum Natural Radiocarbon Measurements IV: Radiocarbon, v. 5, p. 104–108.Google Scholar
Bar-Adon, P., 1962, Israel Explor. Jour., prelim, rept. v. 12, no. 3–4.Google Scholar
Brea, , Bernabo, L., 1960, Malta and the Mediterranean: Antiquity, v. 34, p. 132–137.Google Scholar
Cook, W. H., 1914, Jour. Roy. Anthropol. Inst., v. 44, p. 212–247.Google Scholar
Dawson, W. R., 1927, Making a Mummy: Jour. Egyptian Archaeol., v. 13, p. 40–49.Google Scholar
Eogan, G., 1963, Ireland: Jour. Roy. Soc. Antiq., v. 93, p. 37–81.Google Scholar
Evans, J. D., 1960, Malta and the Mediterranean: Antiquity, v. 34, p. 218–220.Google Scholar
Evans, J. D. 1961, C14 date for the Maltese Early Neolithic: Antiquity, v. 35, p. 143–144.CrossRefGoogle Scholar
Fergusson, G. J. and Libby, W. F., 1963, University of California, Los Angeles, radiocarbon dates II: Radiocarbon, v. 5, p. 1–22.CrossRefGoogle Scholar
Houlder, C. H., 1953, Devon Archaeol. Explor. Soc. Trans., v. 5, pt. 1, p. 6.Google Scholar
Kirkbride, D. V., 1960, Palestine Explor. Quart., July-Dec. 1960.Google Scholar
Kirkbride, D. V. 1961, Illus. London News, Sept. 16, 1961.Google Scholar
Kirkbride, D. V. 1962a, Revue Biblique, v. 69, p. 88–91.Google Scholar
Kirkbride, D. V. 1962b, Discovery, July 1962.Google Scholar
Kirkbride, D. V. 1963, Illus. London News, Jan 19, 1963.Google Scholar
Liddell, D. M., 1931, Report on the excavations at Hembury Fort, Devon, Second season 1931: Devon Archaeol. Explor. Soc., v. 1, p. 105.Google Scholar
Movius, H. V., 1935, Kilgreany Cave, Co. Waterford: Ireland, Jour. Roy. Soc. Antiq., v. 65, p. 254–296.Google Scholar
Oakley, K. P., 1963, Note on the antiquity of Halling man: App. II in Kerney, M.P., 1963, Late Glacial Deposits on the Chalk of S.E. England: Phil. Trans. B., v. 246 no. 730, p. 250–251.Google Scholar
Smith, I. F., 1955, London, Inst. of Archaeol., 11th Ann. Rept., p. 29.Google Scholar
Stuckenrath, R. Jr., 1963, University of Pennsylvania radiocarbon dates VI: Radiocarbon, v. 5, p. 82–103.Google Scholar
Tratman, E. K., Fawcett, E., and Jackson, J. W., 1929, Univ. of Bristol, Proc. of Spel. Soc. for 1928, v. 3, p. 109–152.Google Scholar
Trump, D. H., 1961a, Illus. London News, Aug. 12, 1961.Google Scholar
Trump, D. H. 1961b, Illus. London News, Dec. 30, 1961.Google Scholar
Trump, D. H. 1961c, Skorba, Malta and the Mediterranean: Antiquity, v. 35, p. 300–303.Google Scholar
Trump, D. H. 1962, Illus. London News, Aug. 11, 1962.Google Scholar
Trump, D. H. 1963, Carbon, Malta and the Mediterranean: Antiquity, v. 37, p. 302–303.Google Scholar
Warren, S. H. et al., 1936, Archaeology of the Submerged Land Surface of the Essex Coast: Proc. Prehist. Soc., v. 2, no. 9, p. 178–210. Archaeology of the Submerged Land Surface of the Essex Coast: Proc. Prehist. Soc., v. 2, no. 9, p. 178–210.Google Scholar
Zammit, T. Sir, 1930, Prehistoric Malta, Oxford Univ. Press, Oxford, p. 55.Google Scholar