University of Arizona Radiocarbon Laboratory

University of Arizona Radiocarbon Laboratory
Name	University of Arizona Radiocarbon Laboratory
Established	1960s
Location	Tucson, Arizona
Parent	University of Arizona
Type	Radiocarbon dating laboratory

University of Arizona Radiocarbon Laboratory is a radiocarbon dating facility associated with the University of Arizona located in Tucson, Arizona. The Laboratory provides accelerator mass spectrometry and conventional radiocarbon analyses for researchers across archaeology, paleoclimatology, geochronology, and conservation science, serving projects linked to institutions such as the Smithsonian Institution, the National Park Service, the Library of Congress, and the Peabody Museum of Archaeology and Ethnology. Its work intersects with scholars from the American Antiquity community, staff from the Arizona State Museum, and investigators connected to the Institute of Arctic and Alpine Research.

History

The Laboratory traces origins to mid-20th century initiatives in geochronology at the University of Arizona and grew alongside developments at the Radiocarbon Laboratory, University of Cambridge, the University of California, Berkeley Radiocarbon Laboratory, and the Woods Hole Oceanographic Institution. Early collaborations involved archaeologists from the Society for American Archaeology, paleoecologists from the National Science Foundation, and curators from the Field Museum of Natural History. Over decades the Laboratory engaged with projects supported by the National Geographic Society, the Smithsonian Tropical Research Institute, and the American Museum of Natural History, integrating methods developed at the Max Planck Institute for the Science of Human History and protocols influenced by laboratories such as the Oxford Radiocarbon Accelerator Unit and the Lawrence Livermore National Laboratory. Directors and staff collaborated with researchers affiliated with the Peabody Museum of Archaeology and Ethnology, the Museum of Comparative Zoology, and the Arizona Historical Society.

Facilities and Equipment

The Laboratory houses accelerator mass spectrometry hardware comparable to systems at the Tandem Laboratory and benchmarked against facilities like the ETH Zurich Laboratory of Ion Beam Physics and the National Oceanic and Atmospheric Administration carbon labs. Instrumentation and infrastructure support sample preparation suites, chemical pretreatment hoods, and graphite target preparation benches used by teams drawn from the National Aeronautics and Space Administration, the United States Geological Survey, and the Los Alamos National Laboratory. The facility includes sealed combustion units, vacuum lines, and ion source assemblies consistent with standards originating from the International Atomic Energy Agency guidance, and collaborates with engineers from the California Institute of Technology and technicians from the Massachusetts Institute of Technology for instrumentation upgrades.

Methods and Analytical Services

Analytical services include accelerator mass spectrometry (AMS) radiocarbon dating, conventional beta-counting radiometry, stable isotope ratio analysis, and reservoir correction assessments applicable to marine and freshwater samples. Methodological development has been informed by emission standards from the American Chemical Society and calibration frameworks provided by the IntCal group and the Radiocarbon journal community. The Laboratory performs chemical pretreatments such as acid-base-acid (ABA), humic removal, and cellulose extraction for materials curated at the Metropolitan Museum of Art and the British Museum, and applies Bayesian chronological modelling approaches popularized by groups at the University of Oxford and the University of Cambridge. Sample types processed include charcoal from excavations led by teams at the Peabody Essex Museum, bone collagen from excavations affiliated with the Natural History Museum, London, peat cores studied with the PAGES community, and shell materials from research partners at the Woods Hole Oceanographic Institution.

Research and Collaborations

Research programs encompass archaeology, paleoclimatology, paleoecology, and forensic chronology, with collaborations involving the Smithsonian Institution, the National Park Service, the Arizona State Museum, the Institute of Arctic and Alpine Research, and international partners such as the Max Planck Institute for Evolutionary Anthropology and the University of Copenhagen. Interdisciplinary projects have linked the Laboratory to climate teams at the National Center for Atmospheric Research, to geneticists at the Broad Institute, and to stratigraphic studies coordinated with the Geological Society of America. Graduate and postdoctoral researchers interact with faculty from the School of Anthropology at the University of Arizona, paleobotanists from the Royal Botanic Gardens, Kew, and conservation scientists from the Victoria and Albert Museum. The Laboratory has contributed datasets to consortiums like the Neotoma Paleoecology Database and collaborated on workshops hosted by the American Geophysical Union and the European Geosciences Union.

Notable Projects and Contributions

The Laboratory has dated key materials from southwestern archaeology, paleoenvironmental cores used in megadrought studies tied to research at the University of Colorado Boulder, and chronologies for cultural sequences curated by the Arizona State Museum and the Peabody Museum of Archaeology and Ethnology. It contributed dates to studies published alongside teams from the Smithsonian Tropical Research Institute, the American Museum of Natural History, and the Max Planck Institute for the Science of Human History. Notable applications include chronological frameworks for Ancestral Puebloan research involving collaborators from the Crow Canyon Archaeological Center and the School for Advanced Research, paleoclimatic reconstructions coordinated with the PAGES initiative, and conservation dating for artifacts loaned by the Museum of Fine Arts, Boston and the Metropolitan Museum of Art.

Accreditation and Quality Control

Quality systems adhere to expectations from accreditation bodies such as those associated with the International Organization for Standardization and guidance circulated by the International Atomic Energy Agency. The Laboratory maintains QA/QC protocols harmonized with standards used at the Oxford Radiocarbon Accelerator Unit and the Arizona Department of Health Services for laboratory safety and sample handling. Participation in interlaboratory comparisons and proficiency tests involves partners including the National Physical Laboratory and the United States Geological Survey to ensure traceability, accuracy, and precision compatible with datasets deposited in archives managed by the National Science Foundation and curated by the University of Arizona Special Collections.

Category:Radiocarbon dating laboratories Category:University of Arizona