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Cambridge University Natural Radiocarbon Measurements IV: Nuclear-Weapon Testing and the Atmospheric Radiocarbon Concentration

Published online by Cambridge University Press:  18 July 2016

H. Godwin  and
E. H. Willis
H. Godwin
Affiliation:
Cambridge University
E. H. Willis
Affiliation:
Cambridge University
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In continuance of investigations upon successive annual crops of oats reported in Radiocarbon Supplement, Volume 2, we undertook the analysis of successive annual rings of a tree that had been growing throughout the period covered by the oat-crop assays, namely 1953 to 1959. The selected tree was a straight-boled specimen of Populus nigra from the Forestry Commission's plantations at Santon Downham, near Thetford, Norfolk. It had been planted in 1929 and was felled on 21 October, 1959. Shortly afterwards, it was brought into the laboratory and sawn into slices just over 1 in. thick. The surfaces having been smoothed, the annual-ring contacts were marked, and within each annual ring the inner (spring) wood was marked off from the outer (autumn) wood. The tree had been chosen as one exhibiting rapid growth and it proved fairly easy to dissect off with a chisel all the separate half-rings between spring 1953 and the end of 1959. In the event, activities were determined only upon four of the half or whole rings.

Type
Research Article
Information
Radiocarbon , Volume 3 , 1961 , pp. 77 - 80
Copyright
Copyright © The American Journal of Science 

References

Anderson, W., Bentley, R. E., Burton, L. K., Crookall, J. O., and Greatorex, C. A., 1960, Radioactive fallout during 1959: Nature, v. 186, p. 925–928.Google Scholar
Barclay, F. R., Elliot, M. J. W., Goldsmith, P., Jelly, J. V., and Osborne, A. R., 1960, Some preliminary measurements of the tritium and carbon 14 content of the stratosphere over England: A. E. R. E. Report, R. 3271 (U. K.), p. 1–9.Google Scholar
Bien, E. S., and Suess, M. E., 1959, Increase of C14 in the atmosphere from artificial sources measured in a Californian tree: Zeitschr. für Physik, v. 154, p. 172–174.Google Scholar
Broecker, W. S., and Olson, E. A., 1960, Radiocarbon from nuclear tests II: Science, v. 132, p. 712–721.Google Scholar
Broecker, W. S., and Walton, A., 1959, Radiocarbon from nuclear tests: Science, v. 130, p. 309–310.Google Scholar
Feeley, H. W., and Spar, J., 1960, Tungsten-185 from nuclear bomb tests as a tracer for stratospheric meteorology: Nature, v. 188, p. 1062–1064.CrossRefGoogle Scholar
Münnich, K. O., and Vogel, J. C., 1958, Durch atomexplosionen ergeugter Radiokohlenstoff in der Atmosphëre: Naturwissenschaften, v. 14, p. 327–329.Google Scholar
Peirson, D. H., Crooks, R. N., and Fisher, E. M. R., 1960, Radioactivity of the atmosphere due to distant nuclear test explosions: Nature, v. 186, p. 224–225.CrossRefGoogle ScholarPubMed
Tauber, H., 1959, Post bomb rise in radiocarbon activity in Denmark: Science, v. 131, p. 921–922.Google Scholar
Tauber, H. 1960, Latitudinal effect in the transport of radiocarbon from the stratosphere to the troposhere: Proc. I.A.E.A. Conf. (Copenhagen 1960) on the Use of Radioisotopes in the Physical Sciences and Industry, 10 p. (preprint) Google Scholar
Willis, E. H., 1960, Atmospheric radiocarbon activity in 1959: Nature, v. 185, p. 552–553.CrossRefGoogle ScholarPubMed