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Riken Natural Radiocarbon Measurements VIII

Published online by Cambridge University Press:  18 July 2016

Fumio Yamasaki ,
Chikako Hamada  and
Tatsu Ji Hamada
Fumio Yamasaki
Affiliation:
Institute of Physical and Chemical Research (RIKEN) Wako-shi, Saitama Pref, Japan 351
Chikako Hamada
Affiliation:
Institute of Physical and Chemical Research (RIKEN) Wako-shi, Saitama Pref, Japan 351
Tatsu Ji Hamada
Affiliation:
Institute of Physical and Chemical Research (RIKEN) Wako-shi, Saitama Pref, Japan 351
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The 14C dates given below are continued from our previous list (R, 1972, v 14, p 223–238), and results obtained mainly during 1971–2 are described. A 2.7L stainless steel counter and a 3.3L copper counter are used as previously, yielding background counting rates of 6.9 and 6.0 cpm, respectively, when filled with dead CO2 at ca 1.8 atm. Dates have been calculated on the basis of the 14C half-life of 5568 yr and 95% of NBS oxalic acid is modern standard. No correction has been made for any of the samples in this list.

Type
Research Article
Information
Radiocarbon , Volume 16 , Issue 3 , 1974 , pp. 331 - 357
Copyright
Copyright © The American Journal of Science 

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