Hostname: page-component-7b7567c8c-7pwfn Total loading time: 0 Render date: 2026-11-14T21:06:01.133Z Has data issue: false hasContentIssue false
  • English
  • Français

Progress at the Isotrace Radiocarbon Facility

Published online by Cambridge University Press:  18 July 2016

Roelf P Beukens,
Debbie M Gurfinkel and
Henry W Lee
Roelf P Beukens
Affiliation:
Isotrace Laboratory, University of Toronto, Toronto (Ontario) M5S 1A7 Canada
Debbie M Gurfinkel
Affiliation:
Isotrace Laboratory, University of Toronto, Toronto (Ontario) M5S 1A7 Canada
Henry W Lee
Affiliation:
Isotrace Laboratory, University of Toronto, Toronto (Ontario) M5S 1A7 Canada
Rights & Permissions [Opens in a new window]

Abstract

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.

Since August 1984 over 100 samples have been analyzed. 12C, 13C, and 14C isotopes were measured after acceleration and all dates were corrected for natural and preparation-induced fractionation. A precision of better than 1.0% was obtained for samples 10,000 yr BP or less and these results were shown to be reproducible at precision levels as low as 0.3%. An accuracy of better than 1.0% was demonstrated for the same age range by analyzing samples which were previously dated with the conventional technique. The machine background, measured on blank sample holders in a clean ion source, yielded a count rate equivalent of 0.015 ± 0.007% modern.

Information

Type
I. AMS Techniques
Information
Radiocarbon , Volume 28 , Issue 2A , 1986, pp. 229 - 236
Copyright
Copyright © The American Journal of Science 

References

Bedrich, W, Koch, B, Mai, H, Seidenkranz, U, Syhre, H and Voigtmann, R, 1983, Distortion of secondary ion extraction due to sample surface irregularities, in Benninghoven, A, Giber, J, Laszlo, J, Riedel, M and Werner, H W, eds, Internatl conf on secondary ion mass spectrometry, 3rd, Proc: Springer series in chemical physics, v 19, p 81–87.Google Scholar
Beukens, R P and Lee, H W, 1981, The production of small carbon samples by RF dissociation of acetylene, in Kutschera, W, eds, Symposium on accelerator mass spectrometry, 2nd, Proc: Argonne Natl Lab, p 416–425.Google Scholar
Gurfinkel, D M, 1984, 14C sample preparation: Isotrace 1984 ann rept, p 5–30.Google Scholar
Lee, H W (ms), 1985, Study of 14C detection and dating using accelerator mass spectrometry: PhD dissert, Univ Toronto.Google Scholar
Kieser, W E, Beukens, R P, Kilius, L R, Lee, H W and Litherland, A E, 1986, Isotrace radiocarbon analysis—equipment and procedures, in Internatl conf on ionbeam analysis, 7th, Proc: Nuclear Instruments & Methods, v B15, p 718–721.CrossRefGoogle Scholar
Shimizu, N and Hart, S R, 1982, Isotope fractionation in secondary ion mass spectrometry Jour Appl Physics, v 53, no. 3, p 1303–1311.Google Scholar