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A Preliminary Determination of the Absolute 14C/12C Ratio of OX-I

Published online by Cambridge University Press:  18 July 2016

M L Roberts  and
J R Southon
M L Roberts*
Affiliation:
National Ocean Sciences AMS Facility, Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA
J R Southon
Affiliation:
Keck Carbon Cycle AMS Laboratory, Department of Earth System Science, University of California, Irvine, Irvine, California 92697, USA
*
Corresponding author. Email: [email protected]
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Abstract

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A preliminary determination of the absolute 14C/12C ratio of the oxalic acid I standard (NBS SRM 4990B) has been made. Using an accelerator mass spectrometry (AMS) system, a known number of radiocarbon ions were implanted in a thin copper foil. The foil was then combusted with the addition of 14C-free carrier material. This resulting gas (which had a known 14C/12C ratio) was graphitized and compared to OX-I material. This comparison yielded an absolute 14C/12C ratio of OX-I. The absolute 14C/12C ratio of OX-I, coupled with knowledge of the specific activity of OX-1, provides an alternative determination of the 14C half-life.

Type
Articles
Information
Radiocarbon , Volume 49 , Issue 2 , 2007 , pp. 441 - 445
Copyright
Copyright © 2007 by the Arizona Board of Regents on behalf of the University of Arizona 

References

Bella, F, Alessio, M, Fratelli, P. 1968. A determination of the half-life of 14C. Il Nuovo Cimento B 58(1):232–46.Google Scholar
Broecker, W. 2005. My 53 years in the radiocarbon trenches [plenary talk]. AMS-10 conference, September 5–10, 2005, Berkeley, USA.Google Scholar
Broecker, W, Barker, S. 2007. A 190% drop in atmosphere's Δ14C during the “Mystery Interval” (17.5 to 14.5 kyr). Earth and Planetary Science Letters 256(1–2):90–9.Google Scholar
Fairbanks, RG, Mortlock, RA, Chiu, T-C, Cao, L, Kaplan, A, Guilderson, TP, Fairbanks, TW, Bloom, AL, Grootes, PM, Nadeau, M-J. 2005. Radiocarbon calibration curve spanning 0 to 50,000 years BP based on paired 230Th/234U/238U and 14C dates on pristine corals. Quaternary Science Reviews 24(16–17):1781–96.Google Scholar
Godwin, H. 1962. Half-life of radiocarbon. Nature 195: 984.Google Scholar
Karlén, I, Olsson, IU, Kållberg, P, Kilicci, S. 1964. Absolute determination of the activity of two 14C dating standards. Arkiv för Geofysik 4(22):465–71.Google Scholar
Mann, WB, Marlow, WF, Hughes, EE. 1961. The half-life of carbon-14. International Journal of Applied Radiation and Isotopes 11(1):57–67.Google Scholar
Olsson, IU, Karlén, I, Turnbull, AH, Prosser, NJD. 1962. A determination of the half-life of C-14 with a proportional counter. Arkiv för Fysik 22(3):237–55.Google Scholar
Reimer, PJ, Baillie, MGL, Bard, E, Bayliss, A, Beck, JW, Bertrand, CJH, Blackwell, PG, Buck, CE, Burr, GS, Cutler, KB, Damon, PE, Edwards, RL, Fairbanks, RG, Friedrich, M, Guilderson, TP, Hogg, AG, Hughen, KA, Kromer, B, McCormac, G, Manning, S, Bronk Ramsey, C, Reimer, RW, Remmele, S, Southon, JR, Stuiver, M, Talamo, S, Taylor, FW, van der Plicht, J, Weyhenmeyer, CE. 2004. IntCal04 terrestrial radiocarbon age calibration, 0–26 cal kyr BP. Radiocarbon 46(3):1029–58.Google Scholar
Stuiver, M. 1980. Workshop on 14C data reporting. Radiocarbon 22(3):964–6.Google Scholar
Watt, DE, Ramsden, D, Wilson, HW. 1961. The half-life of carbon-14. International Journal of Applied Radiation and Isotopes 11(1):68–74.Google Scholar
Ziegler, JF, Biersack, JP, Littmark, U. 1985. The Stopping and Range of Ions in Solids. New York: Pergamon Press. 321 p.Google Scholar