Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-03T01:21:34.108Z Has data issue: false hasContentIssue false
  • English
  • Français

Glasgow University Radiocarbon Measurements I

Published online by Cambridge University Press:  18 July 2016

M. S. Baxter ,
M. Ergin  and
A. Walton
M. S. Baxter
Affiliation:
Chemistry Department, The University, Glasgow, W.2.
M. Ergin
Affiliation:
Chemistry Department, The University, Glasgow, W.2.
A. Walton
Affiliation:
Chemistry Department, The University, Glasgow, W.2.
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.

Two radiocarbon counting systems have been established in the Chemistry Department, University of Glasgow, since late 1967.

The counting gas is methane, at pressures up to 10 atm, and 2 alternative procedures are followed for methane production, (a) high pressure synthesis in a stainless steel 4.5 1 reactor and (b) low pressure synthesis in an all glass flow-reactor. Both systems employ 0.5% ruthenium on alumina pellets as catalyst (Engelhard Industries Ltd.). Early samples synthesized with Air Products' hydrogen showed evidence of tritium contamination. This gas supply was later replaced with tritium-free hydrogen supplied by Messrs. Griesheim, Düsseldorf, Germany. Both detectors used for routine measurements are 0.5 1 internal gas counters supplied by Beckman Instruments Inc., California. The detectors are surrounded by a concentric-wall multiple anode anticoincidence counter. The entire counter assembly is encased within a 4-in.-thick lead shield manufactured from aged lead by J. Girdler and Co., London. Counter electronics, anticoincidence system and power supply are of Beckman design (Sharp and Ellis, 1965).

Type
Research Article
Information
Radiocarbon , Volume 11 , Issue 1 , 1969 , pp. 43 - 52
Copyright
Copyright © The American Journal of Science 

References

Birmingham I Shotton, , Blundell, , and Williams, , 1967 Google Scholar
Birmingham II Shotton, , Blundell, , and Williams, , 1968 Google Scholar
Cambridge V Godwin, and Willis, , 1962 Google Scholar
Copenhagen VIII Tauber, , 1967 Google Scholar
Lamont VIII Broecker, and Olson, , 1961 Google Scholar
Bien, G. and Suess, H., 1967, Transfer and exchange of carbon-14 between the atmosphere and the surface water of the Pacific Ocean: Symposium on Radioactive Dating and Methods of Low-Level Counting, I.A.E.A., Vienna, p. 105–115.Google Scholar
Broecker, W. S. and Olson, E. A., 1961, Lamont radiocarbon measurements VIII: Radiocarbon, v. 3, p. 176–204.Google Scholar
Godwin, H. and Willis, E. H., 1962, Cambridge University natural radiocarbon measurements V: Radiocarbon, v. 4, p. 57–70.Google Scholar
Münnich, K. O. and Roether, W., 1967, Transfer of bomb C-14 and tritium from the atmosphere to the ocean: Internal mixing of the ocean and the basis of tritium and C-14 profiles: Symposium on Radioactive Dating and Methods of Low-Level Counting, I.A.E.A., Vienna, p. 93–104.Google Scholar
Nydal, R., 1968, Further investigation on the transfer of radiocarbon in nature: Jour. Geophys. Research, v. 73, p. 3617–3635.CrossRefGoogle Scholar
Olsson, I. U., Karlén, I., and Stenberg, A., 1966, Radiocarbon variations in the atmosphere: Tellus, v. 18, p. 293.Google Scholar
Rafter, T. A., 1965, Increase in the C14 activity in the atmosphere of the southern hemisphere from the testing of nuclear weapons: New Zealand Jour. Sci. and Technology, v. 8, p. 472.Google Scholar
Sharp, R. A. and Ellis, J. G., 1965, System design in low background internal gas sample counting of carbon-14 and tritium: Proc. Inter. Conf. on Radiocarbon and Tritium Dating, 6th, Pullman, Washington, U.S.A., p. 17–28.Google Scholar
Shotton, F. W., Blundell, D. J., and Williams, R. E. G., 1967, Birmingham University radiocarbon dates I: Radiocarbon, v. 9, p. 35–37.Google Scholar
Shotton, F. W., Blundell, D. J., and Williams, R. E. G., 1968, Birmingham University radiocarbon dates II: Radiocarbon, v. 10, no. 2, p. 200–206.Google Scholar
Sissons, J. B., 1967, Glacial stages and radiocarbon dates in Scotland: Scot. Jour. Geology, v. 3, p. 375–381.CrossRefGoogle Scholar
Tauber, Henrik, 1967, Copenhagen radiocarbon measurements VIII, geographic variations in atmospheric C14 activity: Radiocarbon, v. 9, p. 246–256.Google Scholar
Young, J. A. and Fairhall, A. W., 1968, Radiocarbon from nuclear weapons tests: Jour. Geophys. Research, v. 73, p. 1185–1200.Google Scholar
Walton, A., Baxter, M. S., Callow, W. J., and Baker, M. J., 1967, Carbon-14 concentrations in environmental materials and their temporal fluctuations: Symposium on Radioactive Dating and Methods of Low-Level Counting, I.A.E.A., Vienna, p. 41–47.Google Scholar