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Belfast Radiocarbon Dates IV

Published online by Cambridge University Press:  18 July 2016

A. G. Smith
Affiliation:
Palaeoecology Laboratory, Queen's University, Belfast, Northern Ireland
G. W. Pearson
Affiliation:
Palaeoecology Laboratory, Queen's University, Belfast, Northern Ireland
J. R. Pilcher
Affiliation:
Palaeoecology Laboratory, Queen's University, Belfast, Northern Ireland
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The dating equipment and operating conditions remain essentially as previously described. All samples in this list have been counted at a filling pressure equivalent to 152 cm Hg at 20°C. The proportional counter has recently been re-wired, resulting in a lowering of the operating voltage. Electron-microscopic examination of the old counter wire showed considerable thickening due to the accumulation of fine dust particles. A filter is being installed in the filling line to minimize this effect. Pretreatments are as given in previous date lists unless otherwise stated.

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Research Article
Copyright
Copyright © The American Journal of Science