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AMS 14C Sample Preparation at the KCCAMS/UCI Facility: Status Report and Performance of Small Samples

Published online by Cambridge University Press:  18 July 2016

G M Santos*
Affiliation:
Earth System Science, University of California, Irvine, B321 Croul Hall, Irvine, California 92697-3100, USA
R B Moore
Affiliation:
Earth System Science, University of California, Irvine, B321 Croul Hall, Irvine, California 92697-3100, USA
J R Southon
Affiliation:
Earth System Science, University of California, Irvine, B321 Croul Hall, Irvine, California 92697-3100, USA
S Griffin
Affiliation:
Earth System Science, University of California, Irvine, B321 Croul Hall, Irvine, California 92697-3100, USA
E Hinger
Affiliation:
Earth System Science, University of California, Irvine, B321 Croul Hall, Irvine, California 92697-3100, USA
D Zhang
Affiliation:
Earth System Science, University of California, Irvine, B321 Croul Hall, Irvine, California 92697-3100, USA
*
Corresponding author. Email: [email protected]
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Abstract

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We present an overview of accelerator mass spectrometry (AMS) radiocarbon sample preparation and measurements, describing the technical upgrades that now allow us to routinely obtain 0.2–0.3% precision for 1-mg carbon samples. A precision of ∼1% on samples with 100 μg of carbon can also be achieved. We have also developed graphitization techniques and AMS procedures for ultra-small samples (down to 0.002 mg of carbon). Detailed time series are presented for large and small aliquots of standards such as NIST OX-I and OX-II; FIRI-C and -D; IAEA-C6, -C7 and -C8; and 14C-free samples.

Type
Articles
Copyright
Copyright © 2007 by the Arizona Board of Regents on behalf of the University of Arizona 

References

Donahue, DJ, Linick, TW, Jull, AJT. 1990. Isotope-ratio and background corrections for accelerator mass spectrometry radiocarbon measurements. Radiocarbon 32(2):135–42.CrossRefGoogle Scholar
Druffel, ERM, Williams, PM, Bauer, JE, Ertel, JR. 1992. Cycling of dissolved and particulate organic matter in the open ocean. Journal of Geophysical Research 97(C10):15,63959.Google Scholar
Griffin, S, Druffel, ERM. 1985. Woods Hole Oceanographic Institution Radiocarbon Laboratory: sample treatment and gas preparation. Radiocarbon 27(1):4351.Google Scholar
Jull, AJT, Burr, GS. 2006. Accelerator mass spectrometry: Is the future bigger or smaller? Earth and Planetary Science Letters 243(3–4):305–25.CrossRefGoogle Scholar
Kutschera, W. 2000. Accelerator mass spectrometry at VERA. In: Proceedings of the 7th European Particle Accelerator Conference, EPAC 2000. Vienna, Austria. Vienna: Institute of High Energy Physics of the Austrian Academy of Sciences, p 245–9.Google Scholar
Le Clercq, M, van der Plicht, J, Gröning, M. 1998. New 14C reference materials with activities of 15 and 50 pMC. Radiocarbon 40(1):295–7.Google Scholar
Mann, WB. 1983. An international reference material for radiocarbon dating. Radiocarbon 25(2):519–27.CrossRefGoogle Scholar
Ognibene, TJ, Vogel, JS. 2005. A GUI-based AMS data analysis program [poster]. The 10th International Conference on Accelerator Mass Spectrometry, Berkeley, California, 5–10 September 2005.Google Scholar
Pearson, A, McNichol, AP, Schineider, RJ, von Reden, KF, Zheng, Y. 1998. Microscale AMS 14C measurement at NOSAMS. Radiocarbon 40(1):6175.Google Scholar
Santos, GM, Southon, JR, Druffel-Rodriguez, K, Griffin, S, Mazon, M. 2004. Magnesium perchlorate as an alternative water trap in AMS graphite sample preparation: a report on sample preparation at the KCCAMS facility at the University of California, Irvine. Radiocarbon 46(1):165–73.Google Scholar
Santos, GM, Mazon, M, Southon, JR, Rifai, S, Moore, R. 2007a. Evaluation of iron and cobalt powders as catalysts for 14C-AMS target preparation. Nuclear Instruments and Methods in Physics Research B 259(1):308–15.Google Scholar
Santos, GM, Southon, JR, Griffin, S, Beaupre, SR, Druffel, ERM. 2007b. Ultra small-mass AMS 14C sample preparation and analyses at KCCAMS/UCI facility. Nuclear Instruments and Methods in Physics Research B 259(1):293302.Google Scholar
Scott, EM. 2003. Section 1: Fourth International Radiocarbon Intercomparison (FIRI). Radiocarbon 45(2):135–50.CrossRefGoogle Scholar
Southon, JR. 2007. Graphite reactor memory – Where is it from and how to minimize it? Nuclear Instruments and Methods in Physics Research B 259(1):288–92.CrossRefGoogle Scholar
Southon, JR, Santos, GM. 2004a. Ion source development at the KCCAMS facility, University of California, Irvine. Radiocarbon 46(1):33–9.Google Scholar
Southon, JR, Santos, GM. 2004b. Life with MC-SNICS: ion source development at the Keck AMS facility, University of California, Irvine. Paper presented at the Symposium of North Eastern Accelerator Personnel (SNEAP 2004). Hamilton, Canada: McMaster University.Google Scholar
Southon, JR, Santos, GM. 2007. Life with MC-SNICS. Part II: further ion source development at the Keck Carbon Cycle AMS facility. Nuclear Instruments and Methods in Physics Research B 259(1):8893.Google Scholar
Southon, JR, Santos, GM, Druffel-Rodriguez, K, Druffel, E, Trumbore, S, Xu, X, Griffin, S, Ali, S, Mazon, M. 2004. The Keck Carbon Cycle AMS Laboratory, University of California, Irvine: initial operation and a background surprise. Radiocarbon 46(1):41–9.CrossRefGoogle Scholar
Southon, JR, Santos, GM, Druffel, ER, Griffin, S, Trumbore, S, Xu, X. 2005. High throughput, high precision 14C AMS with a small accelerator. In: International Atomic Energy Agency Symposium on Utilisation of Accelerators. Dubrovnik, Croatia, 5–9 June 2005. Available on CD-ROM: IAEA-CN-115-10.Google Scholar
Suter, M, Jacob, St, Synal, H-A. 1997. AMS of 14C at low energies. Nuclear Instruments and Methods in Physics Research B 123(1–4):148–52.CrossRefGoogle Scholar
Vogel, JS. 1992. Rapid production of graphite without contamination for biomedical AMS. Radiocarbon 34(3):344–50.Google Scholar
Xu, X, Trumbore, SE, Zheng, S, Southon, JR, McDuffee, K, Luttgen, M, Liu, J. 2007. Modifying a sealed tube zinc reduction method for preparation of AMS graphite targets: reducing background and attaining high precision. Nuclear Instruments and Methods in Physics Research B 259(1):320–9.Google Scholar