The Keck Carbon Cycle AMS Laboratory, University of California, Irvine

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

Accelerator mass spectrometry · Archaeology · Engineering physics · Geography · Mass spectrometry · National laboratory · Nuclear engineering · Nuclear physics · Physics · Radiocarbon dating · Radiochemistry · Chemistry · Engineering · Environmental Science · Isotope Analysis in Ecology · Mass Spectrometry Techniques and Applications · X-ray Spectroscopy and Fluorescence Analysis

• The Elephant in the Room

  Open Access•Jean-Marc Pétillon, Elise Tartar et al.•Heritage•2026

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• Timing of advance and basal condition of the Laurentide Ice Sheet during the last glacial maximum in the Richardson Mountains, NWT

  Open Access•Denyse Lacelle, Bernard Lauriol et al.•Quaternary Research•2013

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• Respiration of aged soil carbon during fall in permafrost peatlands enhanced by active layer deepening following wildfire but limited following thermokarst

  Open Access•Cristian Estop‐Aragonés, C I Czimczik et al.•Environmental Research Letters•2018

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• Isotopic seasonality of fluvial-derived greenhouse gases implies active layer deepening

  Open Access•Melissa Schwab, Clayton D Elder et al.•Environmental Research Letters•2024

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• Radiocarbon dating of a monumental dragon tree ( Dracaena draco (L.) L.)

  Open Access•Franco Biondi, Guaciara M Santos et al.•Radiocarbon•2025

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• The absolute chronology of the North Cemetery at Ayios Vasileios, Laconia

  Open Access•Pınar Erdil, Michael W Dee et al.•Journal of Archaeological Science…•2024

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• High-precision AMS 14C chronology for Gatecliff Shelter, Nevada

  Open Access•D J Kennett, Brendan J Culleton et al.•Journal of Archaeological Science•2014

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• Evaluating possible sources of error in tree-ring 14C data using multiple trees across South America

  Open Access•Guaciara M Santos, Lucas Duy Nguyen et al.•Radiocarbon•2024

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• Diet, mobility and gendered violence

  Open Access•Katharina Rebay-Salisbury, L Waltenberger et al.•Journal of Archaeological Science…•2026

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• Blank Assessment for Ultra-Small Radiocarbon Samples

  Open Access•Guaciara M Santos, John R Southon et al.•Radiocarbon•2010

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• A High-Precision Chronology for Two House Features at an Early Village Site on Western Santa Cruz Island, California, USA

  Open Access•C S Jazwa, Lynn H Gamble et al.•Radiocarbon•2013

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• Bayesian Analysis of High-Precision AMS 14 C Dates from a Prehistoric Mexican Shellmound

  Open Access•D J Kennett, Brendan J Culleton et al.•Radiocarbon•2011

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• Simple, Rapid, and Cost Effective

  Open Access•Shari L Bush, Guaciara M Santos et al.•Radiocarbon•2013

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• Matching Dendrochronological Dates with the Southern Hemisphere 14 C Bomb Curve to Confirm Annual Tree Rings in Pseudolmedia rigida from Bolivia

  Open Access•Laia Andreu-Hayles, Guaciara M Santos et al.•Radiocarbon•2015

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• Time Series of Surface Water Dissolved Inorganic Carbon Isotopes From the Southern California Bight

  Open Access•Niels E Hauksson, X Xu et al.•Radiocarbon•2024

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• Assessment of Interlaboratory Pretreatment Protocols by Radiocarbon Dating an Elk Bone Found Below Laacher See Tephra at Miesenheim IV (Rhineland, Germany)

  Stuart J Fiedel, Stuart Fiedel et al.•Radiocarbon•2013

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• C Measurements Elucidate Isotopic Differences between Nails and Hair in Modern Humans

  Open Access•Hector A Martinez De La Torre, Kaelyn M Ormsby et al.•Radiocarbon•2014

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• Current Sample Preparation and Analytical Capabilities of the Radiocarbon Laboratory at CologneAMS

  Open Access•J Rethemeyer, M Gierga et al.•Radiocarbon•2019

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• Australian Marine Radiocarbon Reservoir Effects

  Open Access•Sean Ulm, Damien O’Grady et al.•Radiocarbon•2023

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• Bag of Tricks

  Open Access•Guaciara M Santos, Xiaomei Xu•Radiocarbon•2017

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• Time-Integrated Collection of Co 2 for 14 C Analysis From Soils

  Open Access•Shawn Pedron, X Xu et al.•Radiocarbon•2021

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• New AMS dates for Machu Picchu

  Open Access•Richard L Burger, Lucy C Salazar et al.•Antiquity•2021

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• Low-energy 14C AMS in Poznań Radiocarbon Laboratory, Poland

  Open Access•Tomasz Goslar, Justyna Czernik et al.•Nuclear Instruments and Methods…•2004

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• Ultra small-mass AMS 14C sample preparation and analyses at KCCAMS/UCI Facility

  Open Access•Guaciara M Santos, John Southon et al.•Nuclear Instruments and Methods…•2007

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• The Keck Carbon Cycle AMS Laboratory, University of California, Irvine

  Open Access•John Southon, Guaciara Santos et al.•Radiocarbon•2004

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• Blank Assessment for Ultra-Small Radiocarbon Samples

  Open Access•Guaciara M Santos, John R Southon et al.•Radiocarbon•2010

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• Cs Feed Tests and Emittance Measurements on a Modified MC-SNICS Ion Source for Radiocarbon AMS

  Open Access•John Southon, Guaciara dos Santos et al.•Radiocarbon•2007

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• Magnesium Perchlorate as an Alternative Water Trap in AMS Graphite Sample Preparation

  Open Access•G M Santos, J R Southon et al.•Radiocarbon•2004

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• AMS 14 C Sample Preparation at the KCCAMS/UCI Facility

  Open Access•G M Santos, R B Moore et al.•Radiocarbon•2007

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• Ion Source Development at Kccams, University of California, Irvine

  Open Access•J R Southon, G M Santos•Radiocarbon•2004

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• Discussion Reporting of 14 C Data

  Open Access•Minze Stuiver, Henry A Polach•Radiocarbon•1977

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