A great deal of information pertaining to the radiocarbon samples listed here is contained in laboratory forms held by the respective institutions that provided the radiocarbon assays.
More specific and detailed information regarding the samples and their interpretation is contained in published data, site reports, theses and Historic Places Trust reports which ought to also be consulted to place the data in its fuller perspective.
He and Gordon Fergusson were the first to notice an increase in radiocarbon in the atmosphere as a result of nuclear weapons testing in the 1950s.
Measurements of radiocarbon in carbon dioxide in the atmosphere were started at Makara, near Wellington, in 1954.
The timeline below lets you see aspects of Athol's life and work, and how his findings changed scientific thinking.
Dr Christine Prior is Team Leader of the Rafter Radiocarbon Laboratory at GNS Science.
Data is still being collected by NIWA and is the longest running record of its kind in the world.
The analyses presented were intended to rebut the emerging hypothesis that invokes root-plant uptake, transport and reallocation of soil organic carbon into phytoliths that has been recently put forward as an explanation for the anomalous radiocarbon (C) ages (of hundreds to thousands of years old) reported for modern grass phytoliths in Santos et al. We believe that the results presented in Piperno (2015) lack methodological rigor, mostly due to the absence of any procedural blank assessment, and that the attempts to disprove the hypothesis of uptake of soil organic matter (SOM) by phytoliths in Santos et al. Even now, more than 60 years after the technique was first developed, improvements continue to be made to give greater accuracy and reliability.The technique, first developed in America in 1949, created a revolution in the dating of archaeological material.The C-14 decays with the beta particle, and you have some detection equipment and you count the C-14s one by one.Accelerator mass spectrometry is not dependent upon the radioactive decay.For further details relating to specific samples, we recommend you to contact the laboratory and/or the original archaeologists and submitters.