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US Geological Survey, Menlo Park, California, Radiocarbon Measurements II

Published online by Cambridge University Press:  18 July 2016

Stephen W Robinson  and
Deborah A Trimble
Stephen W Robinson
Affiliation:
US Geological Survey, Menlo Park, California 94025
Deborah A Trimble
Affiliation:
US Geological Survey, Menlo Park, California 94025
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The Menlo Park radiocarbon laboratory of the US Geological Survey began operation in January 1976 in a new building with a counting room 9.8m below the ground surface. Shielding above the counters consists of 30cm lead and 8.2m earth. The ionizing cosmic ray flux at the counters is 0.28 cpm/cm2. Background levels obtained thus far are summarized in Table 1.

Type
Date List
Information
Radiocarbon , Volume 23 , Issue 2 , 1981 , pp. 305 - 321
Copyright
Copyright © The American Journal of Science 

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