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Institut Royal du Patrimoine Artistique Radiocarbon Dates II

Published online by Cambridge University Press:  18 July 2016

M. Dauchot-Dehon  and
J. Heylen
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The method used was described in R., 1968, v. 10, p. 29–35. The counter is the same (M.B.L.E. Houtermans and Oeschger) but the electronic apparatus is new; all is transistorized and the installation operates in preset time. The counter is filled at a pressure of 600 to 1000 mm Hg; sample, modern reference, and background are counted at the same pressure and reduced to standard conditions: 760 mm Hg, 20°C. Atmospheric pressure and temperature are measured at each filling. Samples are counted for 20 hours at one month intervals and a third time if measurements do not agree within two standard deviations. Age calculations are based on a contemporary value equal to 0.95 of activity of NBS oxalic acid standard and 5570 yr for the half-life of C14, 1950 used as reference year. Errors quoted include the standard deviations of the count rates for unknown sample, modern and background; no corrections are made for isotopic fractionation.

Type
Research Article
Information
Radiocarbon , Volume 13 , Issue 1 , 1971 , pp. 29 - 31
Copyright
Copyright © The American Journal of Science 

References

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