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The Keck Carbon Cycle AMS Laboratory, University of California, Irvine: Status Report

  • Robert K Beverly (a1), Will Beaumont (a1), Denis Tauz (a1), Kaelyn M Ormsby (a1), Karl F von Reden (a2), Guaciara M Santos (a1) and John R Southon (a1)...

Abstract

We present a status report of the accelerator mass spectrometry (AMS) facility at the University of California, Irvine, USA. Recent spectrometer upgrades and repairs are discussed. Modifications to preparation laboratory procedures designed to improve sample throughput efficiency while maintaining precision of 2–3‰ for 1-mg samples (Santos et al. 2007c) are presented.

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Copyright

Corresponding author

Corresponding author. Email: rbeverly@uci.edu

References

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Bottinga, Y. 1969. Calculated fractionation factors for carbon and hydrogen isotope exchange in the system calcite-carbon dioxide-graphite-methane-hydrogen-water vapor. Geochimica et Cosmochimica Acta 33(1):4964.
Goslar, T, Czernik, J, Goslar, E. 2004. Low-energy 14C AMS in Poznań radiocarbon laboratory, Poland. Nuclear Instruments and Methods in Physics Research B 223–224:511.
Santos, GM, Southon, JR, Druffel-Rodriguez, KC, Griffin, S, Mazon, M. 2004. Magnesium perchlorate as an alternative water trap in AMS graphite sample preparation: a report on sample preparation at KCCAMS at the University of California, Irvine. Radiocarbon 46(1):165–73.
Santos, GM, Southon, JR, Griffin, S, Beaupre, SR, Druffel, ERM. 2007a. Ultra small-mass AMS 14C sample preparation and analyses at KCCAMS/UCI Facility. Nuclear Instruments and Methods in Physics Research B 259(1):293302.
Santos, GM, Mazon, M, Southon, JR, Rifai, S, Moore, R. 2007b. 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.
Santos, GM, Moore, RB, Southon, JR, Griffin, S, Hinger, E, Zhang, D. 2007c. AMS 14C sample preparation at the KCCAMS/UCI Facility: status report and performance of small samples. Radiocarbon 49(2):255–69.
Santos, GM, Southon, JR, Drenzek, NJ, Ziolkowski, LA, Druffel, E, Xu, X, Zhang, D, Trumbore, S, Eglinton, TI, Hughen, KA. 2010. Blank assessment for ultra-small radiocarbon samples: chemical extraction and separation versus AMS. Radiocarbon 52(2–3):1322–35.
Southon, J, 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.
Southon, JR, Santos, GM. 2004. Ion source development at KCCAMS, University of California, Irvine. Radiocarbon 46(1):33–9.
Southon, J, Santos, GM. 2007. Life with MC-SNICS. Part II: recent ion source development at the Keck Carbon Cycle AMS Facility. Nuclear Instruments and Methods in Physics Research B 259(1):8893.
Southon, J, Santos, G, Han, B. 2007. Cs feed tests and emittance measurements on a modified MC-SNICS ion source for radiocarbon AMS. Radiocarbon 49(2):301–5.
Stuiver, M, Polach, HA. 1977. Discussion: reporting of 14C data. Radiocarbon 19(3):355–63.

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