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    • Radiocarbon, Volume 22 (1980)
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    Enrichment of 14C and Sample Preparation for Beta and Ion Counting

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    Author
    Grootes, P. Al
    Stuiver, Minze
    Farwell, G. W.
    Schaad, T. P.
    Schmidt, F. H.
    Issue Date
    1980-01-01
    
    Metadata
    Show full item record
    Citation
    Grootes, P. M., Stuiver, M., Farwell, G. W., Schaad, T. P., & Schmidt, F. (1980). Enrichment of 14C and Sample Preparation for Beta and Ion Counting. Radiocarbon, 22(2), 487-500.
    Publisher
    American Journal of Science
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/652350
    DOI
    10.1017/S0033822200009802
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    We here report on two technical research projects of the Quaternary Isotope Laboratory (QL) vis, (1) the use of thermal diffusion isotopic enrichment to extend the technical range of 14C dating, (2) the preparation of samples for ion counting using a Van de Graaff tandem accelerator. The second project is carried out in cooperation with, and partly at, the Nuclear Physics Laboratory. A gain in dating range of 3 to 4 half-lives can routinely be obtained with the QL and the Groningen enrichment systems. The same gain in age range can be obtained for ion counting with a simplified system that requires only 0.5 to 2g of carbon and 3 to 7 days enrichment time. A method to convert CO2 quantitatively via CO into carbon is described. For short intervals the carbon deposit yields good 12C beams. We also give a different procedure to make graphite-like carbon samples. The preparation of beryllium metal samples is given last.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200009802
    Scopus Count
    Collections
    Radiocarbon, Volume 22, Number 2 (1980)

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