Hostname: page-component-76fb5796d-zzh7m Total loading time: 0 Render date: 2024-04-26T16:11:16.910Z Has data issue: false hasContentIssue false
  • English
  • Français

Riken Natural Radiocarbon Measurements I

Published online by Cambridge University Press:  18 July 2016

Fumio Yamasaki ,
Tatsuji Hamada  and
Chikako Fujiyama
Fumio Yamasaki
Affiliation:
Institute of Physical and Chemical Research (RIKEN) Komagome, Bunkyo-ku, Tokyo, Japan
Tatsuji Hamada
Affiliation:
Institute of Physical and Chemical Research (RIKEN) Komagome, Bunkyo-ku, Tokyo, Japan
Chikako Fujiyama
Affiliation:
Institute of Physical and Chemical Research (RIKEN) Komagome, Bunkyo-ku, Tokyo, Japan
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Natural C14 measurements at the Institute of Physical and Chemical Research (RIKEN) became routine in 1962. The counters presently used are made of stainless steel with a volume of about 2.7 L. They are surrounded by 2.5 cm of pure lead, a ring of 22 propane gas-flow anticoincidence counters, about 10 cm of boric acid and 20 cm of iron. When filled with dead CO2 up to 2 atm, they gave a background counting rate of about 9 cpm (Hamada, 1960).

In this article, results obtained for geologic and archaeologic samples since 1962 are described. Dates have been calculated on the basis of the C14 half-life of 5568 yr, and 95% of NBS oxalic acid as modern standard. Correction for isotopic fractionation was not applied.

Type
Research Article
Information
Radiocarbon , Volume 6 , 1964 , pp. 112 - 115
Copyright
Copyright © The American Journal of Science 

References

Date lists: Google Scholar
Gakushuin I Kigoshi, Tomikura and Endo, , 1962.Google Scholar
Gakushuin II Kigoshi, and Endo, , 1963.Google Scholar
Hamada, T., 1960, Study of the radiocarbon dating I: Rikagaku Kenkyusho Hokoku, v. 36, p. 635.Google Scholar
Japan Archaeological Association, ed., 1954, Toro: Mainichi Press.Google Scholar